Machin J. (1968). "The Permeability of the Epiphragm of Terrestrial Snails to Water Vapor". [./Biological_Bulletin Biological Bulletin]134(1): 87-95. JSTOR, PDF.
Machin J. (1968). "The Permeability of the Epiphragm of Terrestrial Snails to Water Vapor". [./Biological_Bulletin Biological Bulletin]134(1): 87-95. JSTOR, PDF.