R. I.  Johnson, ?The Recent Mollusca of Augustus Addison Gould: Illustrations of the types described by Gould with a bibliography and catalog of his species?, Smithsonian Institution, United States National Museum. Bulletin, vol. 239, 1964.

R. I.  Johnson, ?The Recent Mollusca of Augustus Addison Gould: Illustrations of the types described by Gould with a bibliography and catalog of his species?, Smithsonian Institution, United States National Museum. Bulletin, vol. 239, 1964.