Selected Digitized Books, Available Online, 1950/1959, Online Text, Latin America in Soviet writings, 1945 to 1958; a bibliography, (dcmsiabooks.latinamericainso00okin/) | Library of Congress
The Prosobranch Snail Family Hydrobiidae (Gastropoda: Rissooidea): Review of Classification and Supraspecific Taxa
Alphabetical List of Species with Notes on Synonyms, Taxonomy, Distribution, and Ecology | SpringerLink