World mineral statistics 1974 - 78  production, exports, imports 
compiled by C.D.G. Black... (et al.) 
 - 3rd. ed. 
 - London  H. M. S. O.  1980 
 - 250p. : ill. ; 30cm 
<br/><br/> At head of title: Institute of Geological Sciences. Natural environment Research Council 
<br/><br/><label>ISBN: </label>0118841637 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral industries--Statistics