Plants of Big Bend National Park
Subtitle: with illus. and keys for identification
By: by W.B. McDougall and Omer E. Sperry.
Contributors: Sperry, Omer Edison.
Publisher: U.S. Govt. Print. Off.
Published: 1951
Place of publication: [Washington
Language: eng
Number of pages: 209
Subjects: Botany -- Texas -- Big Bend National Park.
Notes: Issued by U.S. National Forest Service.