STUDY ON PRODUCTIVE RATIO IN FARMLAND CLASSIFICATION
KONG Xiang-bin LIN Jing
Resources & Industries . 2008, (5): 77 -82 . 

京ICP备08011785号-3　文保网安备案：1101080023
Copyright © Resources & Industries, All Rights Reserved.
Tel: 010-82322841　82322886　Fax: 010-82322841　E-mail: zycy@cugb.edu.cn
Powered by Beijing Magtech Co., Ltd.