Balazik, Ronald F. <br/><br/>
Costs and effects of environmental protection controls regulating U.S. phosphate rock mining 
by Ronald F. Balazik 
 - [Washington, D.C.]  U.S. Dept. of the Interior, Bureau of Mines  1983 
 - ii, 37 p.  28 cm. 
 - Information circular  8932 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phosphate industry--Costs--United States<br/>Phosphate industry--Environmental aspects--United States
<br/><br/><label>Dewey Class. No.: </label>622 s