Young, J.B. <br/><br/>
Reprographic principles made easy / 
J.B.Young, C. Eng, MI Mech E. 
 - London :  National Committee for Audia-Viaul Aids...,  1970. 
 - 84 p. :  ill. ;  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photocopying processes.<br/>Copying processes.