Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"United States. Dept. of Commerce. Coast and Geodetic Survey and Heck, Nicholas Hunter and Hazard, Daniel L. (Daniel Lyman)","Progress of work in terrestrial magnetism of the U.S. Coast and Geodetic Survey : report to the section of terrestrial magnetism and electricity of the International Geodetic and Geophysical Union, International Research Council",,G.P.O.,1927,Special publication,,,,https://cir.nii.ac.jp/crid/1130282270258106624