"Molecular evolution Congresses." . . "Biochemistry Congresses." . . "Biochemie Evolution Kongressbericht." . . "Évolution chimique Congrès." . . "Spring Systematics Symposium (4 : 1981 : Chicago)" . . . "Bioquímica Congressos." . . . . . . . . . . "Biochemical aspects of evolutionary biology : [proceedings of the 4th Annual Spring Systematics Symposium, held at the Field Museum of Natural History Chicago, Illinois, May 9, 1981]" . . . . "Conference proceedings" . . . . . . . "Conference papers and proceedings" . . . . . . . . . . "Biochemical aspects of evolutionary biology" . . . . . "Evolució (Biologia) Congressos." . . "Evolution Biochemie Kongressbericht." . . "Kongress." . . "Annual Spring Systematic Symposium (4t : 1981 : Chicago, Estats Units d'Amèrica)" . . . "Annual spring systematics symposium (4 : 1981 : Chigago, Ill.)" . . . "Annual Spring Systematics Symposium (1981 : Chicago, Ill.)" . . . "Molecular evolution." . . "Biochemical aspects of evolutionary biology (1981 : Chigago, Ill.)" . . . . . "Danmark (1981 : Chicago)" . . . "Biochemische Evolution." . . "Biological Evolution Congresses." . . "Spring Systematics Symposium (4th : 1981 : Field Museum of Natural History)" . . .