THE RELATIONSHIP BETWEEN NDVI AND CLIMATE ELEMENTS FOR 22 YEARS IN DIFFERENT VEGETATION AREAS OF NORTHWEST CHINA
GUO Ni, ZHU Yan-Jun, WANG Jie-Min, DENG Chao-Ping
Chin J Plant Ecol . 2008, (2): 319 -327 .  DOI: 10.3773/j.issn.1005-264x.2008.02.008