Studies on Photosynthetic Characteristics of English-walnut in the Field
WANG Hong-xia, ZHANG Zhi-hua, WANG Wen-jiang, SUN Hong-chuan
ACTA AGRICULTURAE BOREALI-SINICA . 2007, (2): 125 -128 .  DOI: 10.3321/j.issn:1000-7091.2007.02.030