| Reference | {Deposit:: ANAMOSA FACIES OF GOWER FORMATION}{Deposit:: MSHA 1989 METAL-NONMETAL MINE FILE REF}{Deposit:: IOWA DOT GEN AGGREGATE SOURCE INFO 1981}{Deposit:: IOWA ST HWY COMM AGGREGATE RESOURCE LISTING 1977}{Deposit:: IOWA GEOLOGICAL SURVEY, ANNUAL REPORT 1906, VOL. 17, P. 283.} |