Swain, Donald C. <br/><br/>
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 .
<br/><br/>"Bibliographical note" : p. 173-179. Bibliographical references included in "Notes" (p. 183-207) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources--United States.