por Beard, L. R | Willey, R. G., coaut.
por Abbott, Jess | Willey, R. G., coaut | E.U.A. Army Corps of Engineers, Hydrologic Engineering C.
por Duke, James H | Smith, Donald J., coaut.Willey, R. G., coaut | E.U.A. Army Corps of Engineers, Hydrologic Engineering C.