Phosphate rock availability-world :  a minerals availability program appraisal / 
by R.J. Fantel ... [et al.]. 
 - Washington :  U.S. Dept. of the Interior, Bureau of Mines,  1984. 
 - v, 65 p. 
 - Information circular ; 8989 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phosphate industry.<br/>Phosphate minea and mining.