Method of test for softening point of bitumen and tar pitches (ring-and-ball apparatus) / 
Standards & Industrial Research Institute of Malaysia 
 - 8 pages :  illustrations ;  30 cm. 
 - Malaysian Standard ;  MS 687 : 1981 .
 - Malaysian Standard ;  MS 687 : 1981 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bituminous material--Testing--Standards--Malaysia