http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
magnetic field in the United States, 1985
1 map : color, both sides ; 120 x 191 cm., on sheet 79 x 115 cm.
Department of the Interior, U.S. Geological Survey ; by Norman W. Peddie and Audronis K. Zunde.
Alaska and Hawaii on verso. Scale 1:3,500,000.
Geophysical investigations (Geological Survey (U.S.)) ; map GP-986-H