煤的分级萃取与组成

刘长城，陈红，孙元宝，王晓华，曹景沛，魏贤勇

Fractionated extraction and composition of coal

LIU Chang-cheng, CHEN Hong, SUN Yuan-bao , WANG Xiao-hua, CAO Jing-pei, WEI Xian-yong

吉林大学学报(理学版) . 2004, (03): 442 -446 .