Gregory, B. A. An introduction to electrical instrumentation : a guide to the use, selection, and limitations of electrical instruments and measuring systems / B. A. Gregory. - [London]: Macmillan, [1979]. - x, 341 p. : ill. ; 23 cm. Includes bibliographical references and index. ISBN: 0333148339 Subjects--Topical Terms: Electric measurementsElectric meters Dewey Class. No.: 621.374