Researches of the Department of Terrestrial Magnetism Carnegie Institution of Washington. Department of Terrestrial Magnetism Published: 1926 Total Pages: 478 Get eBook
Bulletin of the United States Geological Survey Geological Survey (U.S.) Published: 1909 Total Pages: 330 Get eBook
Symposium on Surface and Subsurface Reconnaissance American Society for Testing Materials Published: 1952 Total Pages: 237 Get eBook