Pratt, H. S. (1902). Synopses of North American invertebrates. 12. The trematodes. Part 2. The Aspidocotylea and the Malacocotylea, or digenetic forms. American Naturalist. 36 (431)::887–910; (432): 953–979,.
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Pratt, H. S.
1902
Synopses of North American invertebrates. 12. The trematodes. Part 2. The Aspidocotylea and the Malacocotylea, or digenetic forms