British Guiana : 1. The Mahdia valley. 2. The Bartica triangle. 3. The Kamarang and Kukui valleys. 4. A part of the upper Mazaruni valley /
Stark, J.,Soil Surveyor.
Hill, H.
Rutherford, G. K.
Trinidad and Tobago : [Soils Research and Survey Section, Regional Research Centre, Imperial College of Tropical Agriculture],
1959.
Maps in back pocket are catalogued separately.