Phosphate deposits of the world / 
edited by A.J.G. Notholt, R.P. Sheldon & D.F. Davidson. 
 - Cambridge :  Cambridge University Press,  1989. 
 - v. <2   > :  ill. 
<br/><br/> "International Geological Correlation Programme Project 156: Phosphorites." 
<br/><br/>v. 2. Phosphate rock resources. 
<br/><br/><label>ISBN: </label>0521305098 
<br/><br/><label>LCCN: </label>90025066     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phosphate deposits.