Reference | {Deposit:: MINESINCLUDED IN SECS 7 AND 18 OF T 92 N, R 2 W AND SECS 11}{Deposit:: AND 12 OF T 92 N, R 3 W. LARGEST MINES IN SEC 7}{Deposit:: IOWA GEOL SURV VOL 6, 1896 PP 51-53}{Deposit:: IOWA GEOL SURV 1905 ANNUAL REPORT VOL 16 PP 298-300} |