Federal conservation policy, 1921-1933 /
by Donald C. Swain.
- Berkeley ; Los Angeles : University of California Press, 1963.
- 221 p. ports. ; 24 cm.
- University of California publications in history, v. 76 .
"Bibliographical note" : p. 173-179. Bibliographical references included in "Notes" (p. 183-207)