Lythall, R. T. (Reginald Tarlton) The J & P switchgear book an outline of modern switchgear practice for the non-specialist user R.T. Lythall - 7th ed. 2nd impression (rev.) - London Newnes-Butterworths 1976 - 804p. ill. 24cm Includes bibliographical references and index ISBN: 0408000694 Subjects--Topical Terms: Electric switchgear