Ref ID:	31131
Ref Type:	Journal Article
Authors:	Nguyen Dich Dy,
Title:	Ranh gioi duoi cua ky thu 4 [ The lower quarternary boundary]
Date:	1974
Source:	Khao Co Hoc
Language:	Vietnamese
Notes:	Diacriticals from original publication not included
Date Created:	5/17/2004
Page Start:	21
Page End:	22