Animal parasites : Their life cycles and ecology. Ed 3 - O. Wilford Olsen (Baltinore University Park Press, 1974)
O. Wilford Olsen: Animal parasites : Their life cycles and ecology. Ed 3. (3rd Edition) Baltinore. University Park Press, 1974. 0-8391-0643-3--(591.233OLS)
ENGLISH