Brown, L. L.  1928- <br/><br/>
Characterization and beneficiation of phosphate-bearing rocks from northern Michigan / 
by L. L. Brown, A. R. Rule, and C. B. Daellenbach. 
 - [Washington, D.C.?] :  U.S. Dept. of the Interior, Bureau of Mines,  1981. 
 - ii, 16 p. :  ill. ;  27 cm. 
 - Report of investigations ;  8562 .
 - Report of investigations (United States. Bureau of Mines ; .
<br/><br/><label>LCCN: </label>81607067  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flotation.<br/>Phosphates--Michigan.<br/>Phosphatic fertilizers--Michigan.
<br/><br/><label>LC Class. No.: </label>TN23  TN523  / .U43 no. 8562 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.364 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8562