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close this section of the libraryHoltan, H. N. (Heggie Nordahl), 1909- 4n(1)
View the documentHoltan, H. N. (Heggie Nordahl), 1909- 4n; USDAHL-70 model of watershed hydrology / by H.N. Holtan and N.C. Lopez. Washington : U.S. Dept. of Agriculture, 1971.