Warrington, Albert Russell van Cortlandt. Protective relays v-1: their theory and practice/ Albert Russell van Cortlandt Warrington - 2nd ed. - New York, Wiley C1962. - v. illus.table,figs,photos. 26 cm. Includes Index. Includes bibliography. English ISSN: LCCN: 63004007 Subjects--Topical Terms: Electric relays. Relays. LC Class. No.: TK2861 / .W34 Dewey Class. No.: 621.3178/WAP