Brief History of Geomagnetism and a Catalog of the Collections of the National Museum of American HistoryDOI: info:10.5479/si.00810258.48.1No. 481–87
Multhauf, Robert P. 1987. "Brief History of Geomagnetism and a Catalog of the Collections of the National Museum of American History." Smithsonian Studies in History and Technology, (48) 1–87. https://doi.org/10.5479/si.00810258.48.1.