Geomagnetism applications /
Campbell, Wallace H. 1926-
Geomagnetism applications / by Wallace H. Campbell. - Washington : Denver, CO : U.S. G.P.O. ; Free on application to U.S. Geological Survey, Information Services, 1995. - iv, 31 p. : ill., maps ; 28 cm. - U.S. Geological Survey circular ; 1109 .
Includes bibliographical references (p. 30-31).
Geomagnetism--Industrial applications.
QC815.2 / .C36 1995
Geomagnetism applications / by Wallace H. Campbell. - Washington : Denver, CO : U.S. G.P.O. ; Free on application to U.S. Geological Survey, Information Services, 1995. - iv, 31 p. : ill., maps ; 28 cm. - U.S. Geological Survey circular ; 1109 .
Includes bibliographical references (p. 30-31).
Geomagnetism--Industrial applications.
QC815.2 / .C36 1995