Popenoe, W. P.; Saul, L. R. (1987). Evolution and classification of the late Cretaceous early Tertiary gastropod Perissitys. Contributions in Science, Natural History Museum of Los Angeles County. 380: 37 pp.
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Popenoe, W. P.; Saul, L. R.
1987
Evolution and classification of the late Cretaceous early Tertiary gastropod Perissitys
Contributions in Science, Natural History Museum of Los Angeles County