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EFFECT OF PHOTOPERIOD AND TEMPERATURE ON REPRODUCTION OF THE MONARCH BUTTERFLY. DANAUS PLEXIPPUS.BARKER JF; HERMAN WS.1976; J. INSECT PHYSIOL.; G.B.; DA. 1976; VOL. 22; NO 12; PP. 1565-1568; BIBL. 5 REF.Article

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CARBON ISOTOPE FRACTIONATION DURING MICROBIAL METHANE OXIDATIONBARKER JF; FRITZ P.1981; NATURE (LOND.); ISSN 0028-0836; GBR; DA. 1981; VOL. 293; NO 5830; PP. 289-291; BIBL. 16 REF.Article

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GRANT 114; SOURCE, CORRELATION AND THERMAL MATURATION HISTORY OF HYDROCARBON MINERAL DEPOSITS OF SOUTHERN ONTARIO = CREDITS 114; SOURCE, CORRELATIONS ET HISTORIQUE DE L'EVOLUTION THERMIQUE DES GISEMENTS D'HYDROCARBURES DANS LE SUD DE L'ONTARIOPOLLOCK SJ; BARKER JF; MACQUEEN RW et al.1982; ONT. GEOL. SURV. MISC. PAP.; ISSN 0704-2752; CAN; DA. 1982; VOL. 103; PP. 160-170; BIBL. 13 REF.; 4 TAB. ; ILL.Article