KENYA,Bureau of Standards <br/><br/>
Kenya Standard : specification for school chalks  

 - Nairobi    Kenya Bureau of Standards  1979 
<br/><br/><label>ISBN: </label>KS 03-89: 1979 UDC 667.56 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chalk and crayon
<br/><br/><label>Dewey Class. No.: </label>741.23 KEN