Specification for school chalks/ 
Standards and Industrial Research Institute of Malaysia 
 - Shah Alam :  Standards and Industrial Research Institute of Malaysia,  1989 
 - 7 p. :  ill. 
 - Malaysian standard ;  MS 1160 : 1989 .
 - Malaysian standard ;  MS 1160 : 1989 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chalk--Malaysia