TY  - BOOK
AU  - Quennell A M Ed.
TI  - Rift valleys
T2  - Benchmark papers in geology; 60
U1  - H.6.g1, M2 
PY  - 1982///
CY  - Stroudsburg
PB  - Hutchinson ross        
KW  -  African geology
KW  - Geology
ER  -