Richards, H. G. (1929). THE RESISTANCE OF THE FRESHWATER SNAIL, PHYSA HETEROSTROPHA (SAY) TO SEA WATER. Zenodo.
Chicago Style (17th ed.) CitationRichards, Horace G. THE RESISTANCE OF THE FRESHWATER SNAIL, PHYSA HETEROSTROPHA (SAY) TO SEA WATER. Zenodo, 1929.
MLA (9th ed.) CitationRichards, Horace G. THE RESISTANCE OF THE FRESHWATER SNAIL, PHYSA HETEROSTROPHA (SAY) TO SEA WATER. Zenodo, 1929.
Warning: These citations may not always be 100% accurate.