共 6 条
[1]
Huang M., 2006, JOURNAL OF CHONGQING, V20, P184
[2]
Li J., 2006, JOURNAL OF HUBEI ECO, V3, p[166, 162]
[3]
Li L. J., 2007, HIGHER EDUCATION EXP, P97
[4]
Song W., 2008, TIME EDUCATION, P114
[5]
Yu Y., 2008, GANSU SCIENCE AND TE, V24, P168
[6]
Zhang Y., 2010, FORESTRY EDUCATION I, V28, P63