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Essentials of parasitology
Marvin C. Meyer and O. Wilford Olsen
Bok Engelsk 1975
Animal parasites : their life cycles and ecology
O. Wilford Olsen ; illustrations by the a...
Bok Språk ikke angitt 1974
Life cycle of Uncinaria Lucasi Stiles, 1901 <Nematoda: Ancylostomatidae> of fur seals, Callorhinus Ursinus Linn., on the Pribilof Islands, Alaska
O.Wilford Olsen and Eugene T.Lyons
Bok Språk ikke angitt 1965