| Reference | {Deposit:: F1 < OWEN, D. D., 1844, REPORT OF A GEOLOGICAL EXPEDITION OF A PART OF IOWA, WISCONSIN, AND ILLINOIS IN 1839: U.S. 28TH CONGRESS, FIRST SESSION, SENATE EXECUTIVE DOCUMENT V. 7, NO. 407, 191 P., MAPS.}{Deposit:: HEYL, A. V., FIELD NOTES} |