TY - JOURNAL OF NATURAL RESOURCES A1 - CAO Yu, OU YangHua, XIAO Duning, CHEN Gao T1 - Landscape patterns analysis based on APACK for Ejin natural oasis Y1 - 2004-12-25 00:00:00.0 JF - JOURNAL OF NATURAL RESOURCES JO - JOURNAL OF NATURAL RESOURCES SP - 776 EP - 785 VL - 19 IS - 6 UR - {https://www.jnr.ac.cn/EN/10.11849/zrzyxb.2004.06.013} N1 - 10.11849/zrzyxb.2004.06.013 ER -