TY  - BOOK
AU  - Kummel Bernhard
AU  - Teichert Curt
TI  - Stratigraphic boundary problems: permain and triassic of West Pakistan
U1  - 551.756(5491) 
PY  - 1970///
CY  - Lawrence
PB  - University of press of Kansas
KW  - Permian period
KW  - Stratigraphy
ER  -