Final sulphur and sulphuric acid statistics  : 1984 
/ International Fertilizer Industry Association 
. - London  : The British sulphur corporation limited, 1985
. - 17 p.  ; 30 cm. 
<br/><br/><label>Source: </label> fonds s.600 
<br/><br/><label>Universal Decimal Class. No.: </label>546.224.325.