AEGYPTOCHEYLA SUMMERSI N.GEN., N.SP. (ACARINA: PROSTIGMATA: CHEYLETIDAE)YOUSEF AA.1979; ACAROLOGIA; ISSN 0044-586X; FRA; DA. 1979; VOL. 20; NO 3; PP. 365-367; ABS. GER; BIBL. 1 REF.Article

THE ROLE OF INORGANIC ELECTROLYTES IN THE FLOTATION OF ALPHA -FE₂O₃BIBAWY TA; YOUSEF AA.1982; TENSIDE DETERG.; ISSN 0040-3490; DEU; DA. 1982; VOL. 19; NO 2; PP. 95-99; ABS. GER/FRE/SPA; BIBL. 19 REF.Article

FLOTATION BEHAVIOUR OF HEMATITE = APTITUDE A LA FLOTTATION DE L'HEMATITEBIBAWY TA; YOUSEF AA.1982; TENSIDE DETERG.; ISSN 0040-3490; DEU; DA. 1982; VOL. 19; NO 1; PP. 18-22; ABS. GER/FRE/SPA; BIBL. 38 REF.Article

FLOTATION BEHAVIOUR OF BARIUM SULPHATE.YOUSEF AA; BIBAWY TA.1976; TENSIDE; DTSCH.; DA. 1976; VOL. 13; NO 6; PP. 316-321; ABS. ALLEM. FR. ESP.; BIBL. 41 REF.Article

THE ROLE OF INORGANIC ELECTROLYTES IN THE FLOTATION OF BARIUM SULPHATE.YOUSEF AA; BIBAWY TA.1976; TENSIDE; DTSCH.; DA. 1976; VOL. 13; NO 5; PP. 265-270; ABS. ALLEM. FR. ESP.; BIBL. 15 REF.Article

EFFECT OF SODIUM CHLORIDE AND FLUORIDE ON THE SELECTIVE PRODUCTION OF THE TETRACYCLINE ANTIBIOTICS BY STREPTOMYCES AUREOFACIENSABOU ZEID AZA; YOUSEF AA.1971; PAKIST. J. SCI. INDUSTR. RES.; PAKIST.; DA. 1971; VOL. 14; NO 6; PP. 497-499; BIBL. 12REF.Serial Issue

LIFE HISTORY OF THE ANOETID MITE HISTIOSOMA CATAGLYPHI YOUSEF ET METWALLY WITH A DESCRIPTION OF THE IMMATURE STAGES (ACARI, ASTIGMATA, ANOETOIDEA)YOUSEF AA; EL BADRY EA; METWALLY SH et al.1979; Z. ANGEW. ZOOL.; ISSN 0044-2240; DEU; DA. 1979; VOL. 87; NO 3; PP. 225-229; ABS. GER; BIBL. 13 REF.; 2 ILL.Article

MITES ASSOCIATED WITH VEGETABLE AND ORNAMENTAL PLANTS IN LOWER EGYPT. (ACARINA: PARASITIFORMES, ACARIFORMES) = LES ACARIENS (A.: P., A.) ASSOCIES AUX PLANTES MARAICHERES ET ORNEMENTALES EN BASSE EGYPTEWAHAB AEA; YOUSEF AA; HEMEDA HM et al.1974; BULL. SOC. ENTOMOL. EGYPTE; EGYPTE; DA. 1974; VOL. 58; PP. 359-366; BIBL. 7 REF.Article

ADSORPTION OF BARIUM IONS BY BETA -MANGANESE DIOXIDE AND ITS ACTIVATION IN OLEATE FLOTATIONARAFA MA; YOUSEF AA; MALATI MA et al.1974; INTERNATION. J. MINER. PROCESSG; NETHERL.; DA. 1974; VOL. 1; NO 3; PP. 267-275; BIBL. 1 P.Article

EFFECT OF FOOD ON THE BIOLOGY OF CHELETOGENES ORNATUS (C. F.) (ACARI: PROSTIGMATA: CHEYLETIDAE)ZAHER MA; YOUSEF AA; KANDIL MM et al.1982; ACAROLOGIA; FRA; DA. 1982; VOL. 22; NO 4; PP. 361-366; ABS. FRE; BIBL. 11 REF.Article

THE ISOELECTRIC POINT OF BARIUM SULPHATE.YOUSEF AA; BIBAWY TA; MALATI MA et al.1977; CHEM. AND INDUSTRY; G.B.; DA. 1977; NO 6; PP. 229-230; BIBL. 7 REF.Article

A LOCAL PETROLEUM SULPHONATE FOR THE FLOTATION OF SOME MINERALS AND ORES.BOULOS TR; YOUSEF AA; HILAL M et al.1977; TENSIDE; DTSCH.; DA. 1977; VOL. 14; NO 6; PP. 307-310; ABS. ALLEM. ITAL.; BIBL. 25 REF.Article

EGYPT'S MINERAL RESOURCESYOUSEF AA; BOULOS TR; SAADA MY et al.1972; MING MAG.; G.B.; 1972, VOL. 127, NUM. 0003, P. 265 A 269Serial Issue

SOLAR EVAPORATION OF QARUN LAKE BRINEESTEFAN SF; AWADALLA FT; YOUSEF AA et al.1980; SALT RES. IND.; ISSN 0581-3999; IND; DA. 1980; VOL. 16; NO 1; PP. 1-11; BIBL. 5 REF.Article

EIN PETROLEUM - SULFONAT FUER DIE FLOTATION EINIGER ERZE. = UN SULFONATE DE PETROLE POUR LA FLOTTATION DES MINERAISYOUSEF AA; BOULOS TR; HILAL M et al.1978; AUFBEREIT.-TECH.; DTSCH.; DA. 1978; VOL. 19; NO 2; PP. 70-74; ABS. ANGL. FR.; BIBL. 25 REF.Article

EFFECT OF PREY AND TEMPERATURE ON THE DEVELOPMENT AND BIOLOGY OF CHEYLETUS MALACCENSIS OUDEMANS (ACARI, CHEYLETIDAE)YOUSEF AA; ZAHER MA; KANDIL MM et al.1982; Z. ANGEW. ENTOMOL.; DEU; DA. 1982; VOL. 93; NO 1; PP. 39-42; ABS. GER; BIBL. 9 REF.Article

LIFE HISTORY STUDIES ON THE SOIL MITE SCUTACARUS AGYPTICUS WITH DESCRIPTION OF THE IMMATURE STAGES (ACARINA: SCUTACARIDAE).ELBADRY EA; YOUSEF AA; METWALLY SH et al.1976; PEDOBIOLOGIA; ALLEM.; DA. 1976; VOL. 16; NO 3; PP. 167-170; ABS. ALLEM.; BIBL. 6 REF.Article

FLOTATION OF ALPHA -IRON (III) OXIDE BY CETYLTRIMETHYLAMMONIUM BROMIDE AND ITS ACTIVATION BY PHOSPHATESYOUSEF AA; BI BAWY TA; MALATI MA et al.1975; J. APPL. CHEM. BIOTECHNOL.; G.B.; DA. 1975; VOL. 25; NO 7; PP. 523-534; BIBL. 28 REF.Article

BIOLOGICAL STUDIES ON THE TENUIPALPID MITE, BREVIPALPUS OBOVATUS DONADIEU (ACARINA: TENUIPALPIDAE).WAHAB AEA; YOUSEF AA; HEMEDA HM et al.1974; BULL. SOC. ENTOMOL. EGYPTE; EGYPTE; DA. 1974; VOL. 58; PP. 317-321; BIBL. 1 REF.Article

BIOLOGICAL STUDIES ON THE TYDEID MITE, TYDEUS CALIFORNICUS (BANKS) (ACARINA: TYDEIDAE).WAHAB AEA; YOUSEF AA; HEMEDA HM et al.1974; BULL. SOC. ENTOMOL. EGYPTE; EGYPTE; DA. 1974; VOL. 58; PP. 349-353; BIBL. 3 REF.Article

EFFECT OF SEASON AND GROVEPINE VARIETY ON THE BIOLOGY OF TENUIPALPUS GRANATI SAYED WITH DESCRIPTION OF ITS IMMATURE STAGES (ACARI: PROSTIGMATA: TENUIPALPIDAE)YOUSEF AA; ZAHER MA; ABD EL HAFIEZ AM et al.1980; ACAROLOGIA; FRA; DA. 1980; VOL. 21; NO 3-4; PP. 384-388Article

MAGNETISIERENDE REDUKTION EINIGER EISENERZE UNTER BERUECKSICHTIGUNG IHRER CHEMISCHEN ZUSAMMENSETZUNG = LA REDUCTION MAGNETISANTE DE CERTAINS MINERAIS DE FER EN RELATION AVEC LEUR COMPOSITION CHIMIQUEYOUSEF AA; BOULOS TR; EZZ SY et al.1976; AUFBEREIT.-TECH.; DTSCH.; DA. 1976; NO 4; PP. 192-195; ABS. ANGL. FR.; BIBL. 16 REF.Article

MANGANHALTIGE EISENERZE AEGYPTENS LIEFERN HOCHWERTIGE KONZENTRATE FUER DIE MANGANSTAHL-PRODUKTION. = MINERAIS DE FER MANGANEUX D'EGYPTE FOURNISSANT DES CONCENTRES DE HAUTE VALEUR POUR LA PRODUCTION D'ACIER AU MANGANESEBOULOS TR; YOUSEF AA; EL GEASSY AA et al.1978; AUFBEREIT.-TECH.; DEU; DA. 1978; VOL. 19; NO 7; PP. 316-323; ABS. ANGL. FR.; BIBL. 10 REF.Article

DER EINFLUSS DER MAGNETISIERUNG AUF DIE FLOTIERBARKEIT VON MINERALIEN MIT VERSCHIEDENER PERMEABILITAET = INFLUENCE DE L'AIMANTATION SUR LA FLOTTABILITE DE MINERAIS DE DIFFERENTES PERMEABILITES MAGNETIQUESYOUSEF AA; BOULOS TR; ARAFA MA et al.1974; ERZMETALL; DTSCH.; DA. 1974; VOL. 27; NO 5; PP. 233-236; ABS. ANGL. FR. ESP.; BIBL. 21 REF.Article

KONTROLLIERTE KALZIUMSULFAT-ABSCHEIDUNG ZUR WIRTSCHAFTLICHEN GEWINNUNG VON MINERALSALZEN AUS SEESALZ-GEWINNUNGSANLAGEN = SEPARATION CONTROLEE DU SULFATE DE CALCIUM EN VUE D'UNE EXTRACTION RENTABLE DE SELS MINERAUX DANS DES INSTALLATIONS DE PRODUCTION DE SELS MARINSESTEFAN SF; AWADALLA FT; FELIX NS et al.1980; AUFBEREIT.-TECH.; ISSN 0004-783X; DEU; DA. 1980; VOL. 21; NO 9; PP. 463-469; ABS. FRE/SPA; BIBL. 19 REF.; IDEM ENGArticle