00321nam a2200097Ia 4500008004100000040004400041245006700085260003400152300002000186999001700206180412s9999||||xx |||||||||||||| ||und||  aAhmadu Bello University Library - Zaria 0aWater researchcedited by Allen V. Kneese and stephen C. Smith  aBaltimorebJohn Hopkinsc1966  avii, 526p. :ill  c48400d48400