TY  - GEN
AU  - Bishopp, D.W.
ED  - British Guiana
TI  - The  geology and geography of the Towakaima region, Upper Barama Valley, north west district, 1937-1938
U1  - Pam 558.81 
PY  - 1900///]
CY  - Georgetown
PB  - Geological Survey Department
ER  -