Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska [microform]
Open file report / United States Department of the Interior, Geological Survey
Open-file report (Geological Survey (U.S.)) ;
U.S. Geological Survey open-file report ;
Geological Survey (U.S.)
University of Alaska, Fairbanks. Geophysical Institute.
United States Department of the Interior, Geological Survey.
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska [microform]