Compilation of the administrative policies for the National Parks and National Monuments of Scintific Significance  : natural area category 

 - Washington :  The Department,  1970 
 - 147 p. 
<br/><br/><label>LCCN: </label>39914 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parques nacionales--E.U.A.<br/>Recursos naturales--Conservación.
<br/><br/><label>Dewey Class. No.: </label>719.32  / E83