Gibson, Ulric P. Water well manual : a practical guide for locating and constructing wells for individual and small comunity water supplies - Berkeley, Cal. : Premier Press, 1971 - 156 p. : ilus. - Fotocopia . - Fotocopia . 26-60 LCCN: 67929 Subjects--Topical Terms: Agua subterranea.Agua--Abastecimiento.Pozos. Dewey Class. No.: 631.71 / G5