Brown, L. L.
Characterization and beneficiation of phosphate-bearing rocks from northern Michigan / by L.L. Brown, A.R. Rule and C.B. Daellenbach. - [Washington] : United States. Dept. of the interior, Bureau of Mines, 1981. - 16 p. : ill. - Report of investigations ; 8562 . - Report of investigations (United States. 8562 .
81607067
Flotation.
Phosphates--Michigan.
Phosphatic fertilizers--Michigan
Characterization and beneficiation of phosphate-bearing rocks from northern Michigan / by L.L. Brown, A.R. Rule and C.B. Daellenbach. - [Washington] : United States. Dept. of the interior, Bureau of Mines, 1981. - 16 p. : ill. - Report of investigations ; 8562 . - Report of investigations (United States. 8562 .
81607067
Flotation.
Phosphates--Michigan.
Phosphatic fertilizers--Michigan