Young, J. B. <br/><br/>
Reprographic priciples made easy 
J. B. Young 
 - London:  National Committee for Audio visual Aids in Education,  1970. 
 - 85p. 
<br/><br/> Includes index 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copying processes and machines
<br/><br/><label>Dewey Class. No.: </label>686.4  / YOR