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O. Wilford Olsen has written:
'Animal parasites' -- subject(s): Life cycles, Parasites, Parasitology
'Report on investigations of hookworms, Uncinaria lucasi Stiles, 1901, and hookworm disease of fur seals, Callorhinus ursinus, on the Pribilof Islands, Alaska from ... 1951-1961' -- subject(s): Hookworm disease, Seals (Animals)
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