Nonpoint source pollution -- Mathematical models -- Congresses. : Agricultural nonpoint source pollution : model selection and application : contributions to a workshop held in June 1984 in Venice, Italy / edited by Aldo Giorgini, Franco Zingales ; coedited by Alessandro Marani, Jacques W. Delleur ; sponsored by National Science Foundation, U.S.A., Consiglio Nazionale della Ricerche, Italy
Nonpoint source pollution -- Mississippi River Watershed : Troubled waters : a Mississippi River story / a production of the Bell Museum of Natural History, University of Minnesota ; written and directed by Larkin McPhee ; producer, Larkin McPhee