XIN Xiao-ping, ZHANG Bao-hui, LI Gang, ZHANG Hong-bin, CHEN Bao-rui, YANG Gui-xia . Variation in spatial pattern of grassland biomass in China from 1982 to 2003[J]. JOURNAL OF NATURAL RESOURCES, 2009 , 24(9) : 1582 -1592 . DOI: 10.11849/zrzyxb.2009.09.008