Converting existing hydro-electric dams and reservoirs into pumped storage facilities : : Engineering Foundation conference, Franklin Pierce College, Rindge, N.H., August 18-23, 1974 / [electronic resource] / chairmen, Ellis L. Armstrong, Ted W. Mermel.. — New York : : American Society of Civil Engineers,, c1975.. — viii, 599 p. : : ill. ; 22 cm.