Nutton, Michael Y. <br/><br/>
Ecological crop geography of China and its agro-climatic analogues in north America 

 - Washington :  American Institute of Crop Ecology,  1947. 
 - 28p.  : ill.  ; 27cm. 
 - International agro-climatological series study; 7 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops<br/>China<br/>Crops and climate<br/>Crop zones
<br/><br/><label>LC Class. No.: </label>PAM SB187.C5N8 no.7