1. Eruptive history of Earth's largest Quaternary caldera (Toba, Indonesia) clarified;Chesner;Geology,1990
2. Ice Age Earth; Late Quaternary Geology and Climate;Dawson,1992
3. Crop Water Requirements;Doorenbos,1984
4. Report on the effects of progressive afforestation on the runoff from the Elan valley catchments;Eeles,1986
5. A study of the decline in water level of Lake Toba, Indonesia;Institute of Hydrology,1989