GEOGRAPHIC VARIATION IN THE YELLOW WARBLERS (DENDROICA PETECHIA: PARULIDAE) OF THE PACIFIC COAST OF MIDDLE AND SOUTH AMERICAOLSON SL.1980; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1980; VOL. 93; NO 2; PP. 473-480; BIBL. 6 REF.Article

THE SUBSPECIES OF GRASSHOPPER SPARROW (AMMODRAMUS SAVANNARUM) IN PANAMA (AVES: EMBERIZINAE)OLSON SL.1980; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1980; VOL. 93; NO 3; PP. 757-759; BIBL. 3 REF.Article

FOSSIL WOODCOCKS. AN EXTINCT SPECIES FROM PUERTO RICO AND AN INVALID SPECIES FROM MALTA (AVES: SCOLOPACIDAE: SCOLOPAX).OLSON SL.1976; PROC. BIOL. SOC. WASHINGTON; U.S.A.; DA. 1976; VOL. 89; NO 20; PP. 265-274; BIBL. 6 REF.; 4 ILL.Serial Issue

THE AFFINITIES OF THE FALCONID GENUS SPIZIAPTERYX.OLSON SL.1976; ; AUK; U.S.A.; DA. 1976; VOL. 93; NO 3; PP. 633-636; BIBL. 13 REF.Article

PALEORNITHOLOGY OF ST. HELENA ISLAND, SOUTH ATLANTIC OCEAN.OLSON SL.1975; SMITHSON. CONTRIB. PALEOBIOL.; U.S.A.; 1975, NUM. 0023, P. 1 A 49Serial Issue

A REVIEW OF THE EXTINCT RAILS OF THE NEW ZEALAND REGION (AVES: RALLIDAE).OLSON SL.1975; NATION. MUS. NEW ZEAL., REC.; NEW ZEAL.; DA. 1975; VOL. 1; NO 3; PP. 63-79; BIBL. 32 REF.; 9 ILL.Serial Issue

A REVIEW OF THE EXTINCT RAILS OF THE NEW ZEALAND REGION (AVES: RALLIDAE).OLSON SL.1975; NATION. MUS. NEW ZEAL., REC.; NEW ZEAL.; DA. 1975; VOL. 1; NO 3; PP. 63-79; BIBL. 1 P.; 14 ILL.Article

SYSTEMATICS NOTES ON CERTAIN OSCINES FROM PANAMA AND ADJACENT AREAS (AVES: PASSERIFORMES)OLSON SL.1981; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1981; VOL. 94; NO 2; PP. 363-373; BIBL. 21 REF.Article

A REVISION OF THE SUBSPECIES OF SPOROPHILA ("ORYZOBOSUS") ANGOLENSIS (AVES: EMBERIZINAE)OLSON SL.1981; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1981; VOL. 94; NO 1; PP. 43-51; BIBL. 12 REF.Article

GREATER ANI (CROTOPHAGO MAJOR) IN MEXICOOLSON SL.1978; ; AUK; USA; DA. 1978; VOL. 95; NO 4; PP. 766-767Article

A LOWER EOCENE FRIGATEBIRD FROM THE RIVER FORMATION OF WYOMING (PELECANIFORMES: FREGATIDAE).OLSON SL.1977; SMITHSON, CONTRIB. PALEOBIOL.; U.S.A.; DA. 1977; NO 35; PP. 1-33; BIBL. 11 REF.; 31 ILL.Serial Issue

A NEW SPECIES OF MILVAGO FROM HISPANIOLA, WITH NOTES ON OTHER FOSSIL CARACARAS FROM WEST INDIES (AVES: FALCONIDAE).OLSON SL.1976; PROC. BIOL. SOC. WASHINGTON; U.S.A.; 1976, VOL. 88, NUM. 0033, P. 355 A 365Serial Issue

AN EVALUATION OF THE SUPPOSED ANHINGA OF MAURITIUS.OLSON SL.1975; ; AUK; USA; 1975, VOL. 92, NUM. 0002, P. 374 A 376Serial Issue

A CRITIQUE OF CRACRAFT'S CLASSIFICATION OF BIRDSOLSON SL.1982; ; AUK; ISSN 0004-8038; USA; DA. 1982; VOL. 99; NO 4; PP. 733-739; BIBL. 23 REF.Article

A REVISION OF THE NORTHERN FORMS OF EUPHONIA XANTHOGASTER (AVES: THRAUPIDAE)OLSON SL.1981; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1981; VOL. 94; NO 1; PP. 101-106; BIBL. 2 REF.Article

A REAPPRAISAL OF THE FOSSIL HERON PALAEOPHOYX COLUMBIANA MCCOY.OLSON SL.1974; ; AUK; USA; 1974, VOL. 91, NUM. 0001, P. 179 A 180Serial Issue

EVIDENCE FOR A POLYPHYLETIC ORIGIN OF THE PICIFORMESOLSON SL.1983; ; AUK; ISSN 0004-8038; USA; DA. 1983; VOL. 100; NO 1; PP. 126-133; BIBL. 21 REF.Article

THE DISTRIBUTION OF FUSED PHALANGES OF THE INNER TOE IN THE ACCIPITRIDAEOLSON SL.1982; BULL. BR. ORNITHOL. CLUB; ISSN 0007-1595; GBR; DA. 1982; VOL. 102; NO 1; PP. 8-12; BIBL. 11 REF.Article

THE NATURE OF THE VARIABILITY IN THE VARIABLE SEEDEATER IN PANAMA (SPOROPHILA AMERICANA: EMBERIZINAE)OLSON SL.1981; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1981; VOL. 94; NO 2; PP. 380-390; BIBL. 9 REF.Article

A GREAT AUK, PINGUINIS, FROM THE PLIOCENE OF NORTH CAROLINA (AVES: ALCIDAE).OLSON SL.1977; PROC. BIOL. SOC. WASHINGTON; U.S.A.; DA. 1977; VOL. 90; NO 3; PP. 690-697; BIBL. 13 REF.; 3 ILL.Article

A JACANA FROM THE PLIOCENE OF FLORIDA (AVES:JACANIDAE).OLSON SL.1976; PROC. BIOL. SOC. WASHINGTON; U.S.A.; DA. 1976; VOL. 89; NO 19; PP. 259-264; BIBL. 9 REF.; 2 ILL.Serial Issue

THE PLEISTOCENE RAILS OF NORTH AMERICA.OLSON SL.1974; CONDOR; USA; 1974, VOL. 76, NUM. 0002, P. 169 A 175Serial Issue

GEOGRAPHIC VARIATION IN CHLOROSPINGUS OPHTHALMICUS IN COLOMBIA AND VENEZUELA (AVES: THRAUPIDAE)OLSON SL.1983; PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON; ISSN 0006-324X; USA; DA. 1983; VOL. 96; NO 1; PP. 103-109; BIBL. 8 REF.Article

REVISION OF THE TAWNY-FACED ANTWREN, MICROBATES CINEREIVENTRIS (AVES: PASSERIFORMES)OLSON SL.1980; PROC. BIOL. SOC. WASH.; ISSN 0006-324X; USA; DA. 1980; VOL. 93; NO 1; PP. 68-74; BIBL. 9 REF.Article

REMARKS ON THE GENERIC CHARACTERS OF BULWERIAOLSON SL.1975; IBIS; G.B.; DA. 1975; VOL. 117; NO 1; PP. 111-113; BIBL. 7REFArticle