Preservation of natural conditions
By: by the Ecological Society of America. Committee on the preservation of natural conditions .
Publisher: Schnepp & Barnes, printers
Published: 1921
Place of publication: Springfield, Ill
Language: eng
Number of pages: 32
Subjects: National parks and reserves; Natural history; Natural monuments
Notes: "Reprinted for the Committee, 1921, with the aid of the National research council."