TY - BOOK T1 - Soil survey of Mercer County, Illinois / DA - [1991] CY - [Washington, D.C.?] : AU - Elmer, Steven L. VL - no. 135 CN - S599.I3 CN - S599.I3 PB - The Service, PP - [Washington, D.C.?] : PY - [1991] N1 - Cover title. N1 - Shipping list no.: 91-713-P. N1 - "Issued July 1991"--P. iii. N1 - Includes index to map units. ID - 136184 KW - Soil surveys KW - Soils TI - Soil survey of Mercer County, Illinois / ER -