TY  - BOOK
AU  - Graves, G.W.
AU  - Hatfield, G.B., coaut.Whinston, A., coaut.
TI  - Water pollution control using by-pass piping / by G.W. Grav-es, G.B. Hatfield, and A. Whinston
CY  - Los Angeles, Calif. : ute
ER  -