Book reviewed in this articleHuman Dimensions of Weather Modificationby W. R. Derrick SwellPerception of the Drought Hazard on the Great Plainsby Thomas F. SaarinenPlant Environment and Efficient Water Use edited by W. H. PierreScientific Problems of the Humid Tropical Zone Deltas and Their Implications: Proceedings of the Dacca Symposium; jointly organized by the Government of Pakistan and UNESCO, 1964Statistical Methods in Hydrology, Proceedings of Hydrology Symposium held at McGill University, 1966Isotopes in Hydrology, Proceedings of the Symposium held by the International Atomic Energy Agency and International Union of Geodesy and Geophysics, Vienna, 14‐18 November 1966The Fresh Water of New York State: Its Conservation and Use, Proceedings of Symposium held in Buffalo, New York in 1966; 255 pagesThe Technology of Fish Utilizationedited by Rudolf KreuzerWater and Wastewater Engineering, Vol. 2: Water Purification and Wastewater Treatment and Disposalby G. M. Fair, J. C. Geyer and D. A. OkunDetergentien und Öle im Wasser und Abwasser(Detergents and Oils in Water and Sewage), Hans Liebm
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