Freshwater sponges, hydroids & Polyzoa. By N. Annandale.

Freshwater Sponges, Hydroids & Polyzoa

American hydroids ... By Charles Cleveland Nutting ...

pt.2

American hydroids ... By Charles Cleveland Nutting ...

pt.1

A correlation of the Mayan and European calendars / by J. Eric Thompson, Assistant Curator of Mexican and South American Archaeology ; Berthold Laufer, Curator of Anthropology, editor.

v.17:no.1(1927)

A revision of the North American and European staphylinid beetles of the subtribe Gyrophaenae (Aleocharinae, Bolitocharini) [by] Charles H. Seevers.

v.32:no.10(1951)