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41. Geophysical investigations, maps. Total Intensity aeromagnetic map [and accompanying aeromagnetic profiles] of southern part of Crow Wing County, Minn., aeromagnetic survey 1947 by .1. R. Henderson and M. E. Hill. Scale 1 m.= 1 in. for map and 1 m.= 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/6/sh.1-2

42. Geophysical investigations, maps. Total Intensity aeromagnetic map of Jasper County, Ind., aeromagnetic survey 1947 by W. J. Dempsey, J. R. Henderson. R. T. Duffner. Scale 1 m. = 1 in., contour interval 10 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:In 2/12/949

43. Geophysical investigations, maps. Total Intensity aeromagnetic map of Lake County, Ind., aeromagnetic survey 1947 by W. J. Dempsey, J. R. Henderson, R. T. Duffner. Scale 1 m.= 1 in., contour interval 10 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:In 2/13/949

44. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of Wadena County and part of Hubbard County, Minn., aeromagnetic survey 1947 by J. R. Paisley and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m.= 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/12/sh.1-2

45. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of central part of Cass County, Minn., aeromagnetic survey 1947 by J. R. Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m.=0.5 in. for profiles contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/2/sh.1-2

46. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of northern part of Crow Wing County, Minn., aeromagnetic survey 1947 bv J. R Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m. = 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/5/sh.1-2

47. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of part of Hubbard County, Minn., aeromagnetic survey 1947 by J. R. Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 in. = 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/7/sh.1-2

48. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of southern part of Beltrami County. Minn., aeromagnetic survey 1947 by J. R. Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m. = 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/sh.1-3

49. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of southern part of Cass County. Minn., aeromagnetic survey 1947 by J. R. Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m. = 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/4/sh.1-2

50. Geophysical investigations, maps. Total intensity aeromagnetic map [and accompanying aeromagnetic profiles] of western part of Itasca County, Minn., aeromagnetic survey 1947 by J. R. Henderson and M. E. Hill. Scale 1 m. = 1 in. for map and 1 m. = 0.5 in. for profiles, contour interval 50 gammas, n. p.

Corporate/Agency Authors:: Geological Survey and Interior Dept.
Publisher:: Geological Survey
Date:: 1949
SuDoc number:: I 19.25:M 666/8/sh.1-2

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