Brown, L. L. <br/><br/>
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 .
<br/><br/><label>LCCN: </label>81607067  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flotation.<br/>Phosphates--Michigan.      <br/>Phosphatic fertilizers--Michigan