Walker, Rodger. Pump selection : a consulting engineer's manual / Rodger Walke r. - Ann Arbor : Ann Arbor Science, [1972]. - 118 p. : ill. ; 24 cm. Includes bibliographical references (p. 43). ISBN: 0250400057 Subjects--Topical Terms: Pumping machinery.Pumping stations. Dewey Class. No.: 621.252