Magnetic and electric investigations of the Department of Terrestrial Magnetism of the Carnegie Institution of Washington, April 1935 to March 1936
1955 ◽
Vol 60
(3)
◽
pp. 367-368
1970 ◽
Vol 38
◽
pp. 151-153
1929 ◽
Vol 34
(2)
◽
pp. 151
◽