Chapman, Sydney The earth's magnetism. - [2d ed., rev. and reset] - London New York Methuen Wiley [1951] - 127 p. illus. 17 cm. - Methuen's monographs on physical subjects . LCCN: 51012043 /L Subjects--Topical Terms: Geomagnetism LC Class. No.: QC815 / .C5 1951 Dewey Class. No.: 538.7