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Methods and Results
U.S. Coast and Geodetic Survey
其他書名
Directions for Measurement of Terrestrial Magnetism. Appendix No. 8 - Report for 1881
出版
U.S. Government Printing Office
, 1882
URL
http://books.google.com.hk/books?id=asY9AAAAMAAJ&hl=&source=gbs_api
EBook
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