题 名：论两种二叠——三叠系界线(Discussion on the two types of Permian-Triassic boundaries)
关键词：
作 者：姚建新 李子舜(Yao Jian-xin and Li Zi-shun)
年卷期：1988年12卷3期
页 码：226-229
文 摘：
A lot of work have been done on the researches of the Permian-Triassic boundary during recent
