http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pollen morphology and the relationship of the Plumbaginaceae, Polygonaceae, and Primulaceae to the order Centrospermae
1 online resource (iii, 64 pages) : illustrations.
Includes bibliographical references (pages 15-16).
Washington : Smithsonian Institution Press, 1977
Smithsonian contributions to botany ; no. 37