na INLIS000000000018244 20231103021313 231103 0 eng 0010-1218000082 591.51 591.51 KOR a KORTLANDT, A. Aspects and prospects of the concept of instinct.(Vicisstudes of the hierarchy Theory) / A. Kortland Leiden : Archives Neerlandaises de Zoologie, 1955 130 p. : 23,5 cm Repr.: Archives Neerlandaises de Zoologie. 11, 1955: 155-284 ANIMALS PSYCHOLOGY ZOOLOGY mfn-20082