Special Publications, Edição 63U.S. Government Printing Office, 1920 |
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Página 5 - Director of the Department of Terrestrial Magnetism of the Carnegie Institute of Washington...
Página 9 - In 1905 the Department of Research in Terrestrial Magnetism of the Carnegie Institution of Washington was authorized to undertake a magnetic survey of the Pacific Ocean, and the necessary funds were allotted.