TY  - BOOK
AU  - Gregory,John Walter,1864-
TI  - The rift valleys and geology of East Africa: an account of the origin & history of the rift valleys of ..
PY  - 1921///
CY  - Service & Co. Limited, London
PB  - Seeley
KW  - Geology
KW  - Africa, British East
KW  - Africa, East
KW  - Physical geography
N1  - p. 423-453
ER  -