Plant hardiness zone map / 
prepared by the U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture in cooperation with the American Horticultural Society. 
 - Rev. 1965. 
, Scale ca. 1:7,500,000. 
 - Washington, D.C. :  Agricultural Research Service,  [1965] 
 - 1 map :  col. ;  49 x 73 cm., folded to 28 x 19 cm. 
 - Miscellaneous publication ;  no. 814 .
 - Miscellaneous publication (United States. Department of Agriculture) ;  no. 814 .
<br/><br/> Also shows southern Canada.  Text and adapted version of color map on verso.  "*U.S. Government Printing Office: 1965 OF-782-915." 
<br/><br/><label>LCCN: </label>map66000059  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atmospheric temperature--United States--Maps.<br/>Atmospheric temperature--Canada--Maps.<br/>Plants--Hardiness--United States--Maps.<br/>Plants--Hardiness--Canada--Maps.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Climate--Maps.<br/>Canada--Climate--Maps.
<br/><br/><label>LC Class. No.: </label>S21  / .A46 no. 814