PHOTOSYNTHETIC CHARACTERISTICS OF SIX PLANT SPECIES IN A FOREST STEPPE OF THE LOESS PLATEAU, CHINA
XU Hong-Mei, GAO Qiong, HUANG Yong-Mei, JIA Hai-Kun
Chin J Plan Ecolo . 2004, (2): 157 -163 .  DOI: 10.17521/cjpe.2004.0023