Some North American larval trematodes Cort, William W. (William Walter), 1887-1971 creator text book Urbana, Ill The University of Illinois c1915 1915
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ENG "Contributions from the Zoological laboratory of the University of Illinois under the direction of Henry B. Ward, no. 44." On cover: University of Illinois bulletin. vol. XII, no. 45. Published also as thesis (PH.D.) University of Illinois, 1914. Trematoda QL391.T7 C6 Illinois biological monographs, v. 1, no. 4 https://www.biodiversitylibrary.org/bibliography/16795 750940 10.5962/bhl.title.16795