Quality marking scheme / 
by Directorate of Industrics 
 - Ahmedabad :  Directorate of Industrics,  1973 
 - 22 p. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quality control
<br/><br/><label>Dewey Class. No.: </label>658.562