The soils of British Guiana south of the 5th Parallel and of the North West District/
by D.W. Duthie.-
- [Georgetown] : Agricultural Journal of British Guiana, 1939.
- [21] p.
Photocopy. Reprinted from: the gricultural Journal of British Guiana, vol. 10, No. 4, 1939, p. 173-193.