Asiatic Pteridophyta collected by Joseph F. Rock, 1920-1924
By: by Carl Christensen.
Contributors: Rock, Joseph Francis Charles, 1884-1962.; United States National Herbarium.
Series: Contributions from the United States National Herbarium -- v. 26, pt. 6
Publisher: U.S. G.P.O.
Published: 1931
Place of publication: Washington
Language: eng
Number of pages: 337
Subjects: Pteridophyta.
Notes: Includes index.