Free living nematodes in the collection of the Zoological Museum of the Imperial Academy of Sciences in Petrograd / I. N. Filipʹev. Translated by M. M. Haque edited by V. S. Kothekar. Filipʹev, Ivan Nikolaevich, 1889-1937. Nematodes Collection and preservation. QL391.N4 F5313 595.13 19 FIF Includes bibliographical references. New Delhi : Amerind, c1973. c1973. 1973 Text 55 p. : eng engrus