The systematics of the Parmelia dubia group in North America
By: William L. Culberson and Chicita F. Culberson
Contributors: Culberson, Chicita F.
Published: 1956
Language: eng
Number of pages: 687
Notes: Reprinted from the American Journal of Botany, v. 43, no. 9, November 1956, p. 678-687.

Includes bibliographical references (p. 686-687).