Magnetic and gravity study of the Paducah 1° x 2° CUSMAP Quadrangle, Illinois, Indiana, Kentucky, and Missouri / by Thomas G. Hildenbrand, Robert P. Kucks, and Paul C. Heigold.
(The Paducah CUSMAP Quadrangle, resource and topical investigations ; C) (U.S. Geological Survey bulletin ; 2150-C)