..............page:21-24,28
Further Studies on the Value of Natural Resources
xie yu-min1; wei xiao-ping2; fu xing-fang3 \ (1the wuxi polytechnic of light industry; wuxi 214036; china; 2management school; china university of mining technology; xuzhou 221008; china; 3the third department; logistics academy to pla air force; xuzhou 221000
..............page:60-64
..............page:32-34,48
..............page:29-31,75