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1. Aeromagnetic map of Minnesota, southeastern region, Plate 1
1991. Chandler, Val W. Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected...
2. Aeromagnetic map of Minnesota, southeastern region, Plate 2
1991. Chandler, Val W. Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (line...
3. Arctic Ice Chart, April 2, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 2, 1991. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
4. Arctic Ice Chart, April 22, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 22, 1991. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
5. Arctic Ice Chart, April 29, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 29, 1991. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
6. Arctic Ice Chart, April 8, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 8, 1991. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
7. Arctic Ice Chart, August 12, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 12, 1991. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
8. Arctic Ice Chart, August 19, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 19, 1991. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
9. Arctic Ice Chart, August 26, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 26, 1991. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
10. Arctic Ice Chart, August 5, 1991
1991. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 5, 1991. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).