Reference | {Deposit:: BRETZ, J HARLEN, 1950 , ORIGIN OF THE FILLED SINK-STRUCTURES AND CIRCLE DEPOSITS OF MISSOURI: GEOLOGICAL SOCIETY OF AMERICA BULLETIN, V. 61 , P. 789 - 834 .}{Deposit:: NASON, FRANK L., 1892 , A REPORT ON THE IRON ORES OF MISSOURI: MISSOURI GEOLOGICAL SURVEY, 1ST SER., V. 2 , P. 123 - 129 .} |