Johanson, Robert C. <br/><br/>
Users manual for hydrological simulation program Fortran (HSPF) / 
by Robert C. Johanson, John C. Imhoff [and] Harley H. Davis 
 - Washington, D.C. :  U.S. Government Printing Office,  1980 
 - v, 678 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology
<br/><br/><label>Dewey Class. No.: </label>551.49