341. Mount Olive Yale Public content 1915. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
342. Mount Vernon, Ill Yale Public content 1940. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
343. Mt. Carroll, Ill Yale Public content 1944. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
344. Mt. Sterling, Ill Yale Public content 1929. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
345. Murphysboro Yale Public content 1910. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
346. Murphysboro-Herrin folio, Illinois Yale Public content 1912. 2013-03-14T19:05:52Z. 2013-03-14T19:05:52Z. Shaw, E. W. (Eugene Wesley), 1881-1935. U.S. Geological Survey. English. Public. Illinois and États-Unis.
347. Muscatine, Iowa-Ill Yale Public content 1948. 2011-12-12T21:26:38Z. 2022-03-29T20:39:22Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Iowa.
348. Nashville, Ill Yale Public content 1936. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
349. Nebo, Ill.-Mo. Yale Public content 1942. 2011-12-12T21:26:10Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Missouri.
350. New Athens Yale Public content 1912. 2011-12-12T21:26:11Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.