32 research outputs found

    Regional maps of vertical magnetic intensity in Illinois.

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    Cover title.Bibliography: p. 8

    A gravity survey of extreme southeastern Illinois.

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    Cover title.Bibliography: p. 11-12

    An Electrical earth resistivity survey of the Macon-Taylorville ridged-drift aquifer

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    Includes bibliographical references (p. 8)

    Seismic reflection and seismic refraction surveying in northeastern Illinois

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