Preston, Richard Joseph,  1905- <br/><br/>
Rocky mountain trees  a handbook of the native species with plates & distribution maps 
by Richard J. Preston, Jr 
 - 3d rev. ed. 
 - New York  Dover Pub. Inc.  1968 
 - lxxx, 285 p. : ill., maps. ; 22 cm. 
<br/><br/> 'A revised and corrected republication of the work published ... in 1947.' 
<br/><br/>Bibliography: p. lxxi-lxxii. 
<br/><br/><label>LCCN: </label>68-020408 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees--Rocky Mountains