Heller, Robert Chester,  1918- <br/><br/>
Identification of tree species on large-scale panchromatic and color aerial photographs /  by R.C. Heller, G.E. Doverspike, and R.C. Aldrich. 

 - Washington, D.C. :  U.S. Dept. of Agriculture, Forest Service,  1964. 
 - 17 p. :  illus.  27 cm. 
 - Agriculture handbook / United States Department of Agriculture ;  no. 261 .
 - Agriculture handbook (United States. Department of Agriculture) ;  no. 261. .
<br/><br/>Bibliography: p. 15. 
<br/><br/><label>LCCN: </label>agr64000381  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aerial photography in forestry.<br/>Photographic interpretation.<br/>Trees--Identification.--Minnesota--Ely
<br/><br/><label>LC Class. No.: </label>SD387.A25  / H4 
<br/><br/><label>National Agricultural Library Call No.: </label>1  / Ag84Ah no.261