Methods of test for petroleum and its products.  Part 139.  neutralization number of petroleum products and lubricants (colour indicator titration method) / 
British Standards Institution. 
 - 9 pages :  32cm. 
 - British standard ;  BS 2000 : Part 139 : 1983 .
 - British standard ;  BS 2000 : Part 139 : 1983 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum products--Analysis--Great Britain.<br/>Petroleum products--Density.