Wellman, Frederick Edward. The protective gear handbook / F.E.Wellman and H.G.Bell. - 2nd ed., by F. E. Wellman in collaboration with H. G. Bell and J. W. Hodgkiss. - London, Pitman, 1968. - xi, 379 p. 3 fold. plates, illus., forms. 23 cm. Includes index. Includes bibliographies. ISBN: 0273436554 LCCN: 77400252 Nat. Bib. No.: B68-15775 Subjects--Topical Terms: Protective relays.Electric switchgear. LC Class. No.: TK2861 / .W39 1968 Dewey Class. No.: 621.3178/WEP