Conservation in the United States A. F. Gustafson, H. Ries, C. H. Guise, [and] W. J. Hamilton, Jr.

Conservation in the United States A. F. Gustafson, H. Ries, C. H. Guise, [and] W. J. Hamilton, Jr.

Manylion Llyfryddiaeth
Prif Awdur: Gustafson, Axel Ferdinand 1880-
Awduron Eraill: Ries, Heinrich 1871-, Guise, Cedric Hay 1890-, Hamilton, William John 1902-
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Ithaca, N. Y. Comstock publishing company 1949.
Pynciau:
Natural resources.
United States > Economic conditions.