na INLIS000000000024908 Ind 0010-1218006746 Progress in protozoology: abstracts of papers read at the 3rd international congress on protozoology, Leningrad, 2-10 July 1969 INTERNATIONAL CONGRESS OF PROTOZOOLOGY (3rd : 1969 : Leningrad) A.A. Strelkov; K.M. Sukhanova; I.B. Baikov Leningrad Nauka 1969 393 p. ; 21 cm. 393 p. ; 21 cm. 593.1INTp 593.1 PROTOZOOLOGY 863/72