na INLIS000000000026290 Ind 0010-1218008128 Comparative-ecological studies of some East-African birds of prey SMEENK, C. C. Smeenk Wageningen Ponsen Looijen 1974 87 p. : ill. ; 24 cm. 87 p. : ill. ; 24 cm. 591.5(69)SMEc Thesis(Doctor in de Wiskunde en Natuurkunde Wetenschappen)-aan de Vrije Universiteit te Amsterdam 591.5(69) PREDATORY BIRDS ANIMAL ECOLOGY EAST AFRICA 281/DTS/75