EN中文
Geographic Type Identification of Valley Economy：A Case of Mentougou District in Beijing, China
Chun-la LIU, Yi-feng ZHANG, Mei XU, Pei-lin LIU
SCIENTIA GEOGRAPHICA SINICA . 2012, (1): 39 -46 .  DOI: 10.13249/j.cnki.sgs.2012.01.39