TY - RPRT TI - Geologic map of the Rolla 1 degree by 2 degrees Quadrangle, Missouri AU - W. P. Pratt AU - Mark A. Middendorf AU - I.R. Satterfield AU - Paul E. Gerdemann PY - 1992 DO - 10.3133/i1998 UR - https://pubs.usgs.gov/publication/i1998 ID - i1998 ER -