MM 1201 & MM 961 Data tablets :  technical reference / 
Summagraphics Corporation. 
 - Fairfield, CT 06430 U.S.A. :  Summagraphics Corporation,  c1984. 
 - various pages :  ill. ;  29 cm. 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data tablets
<br/><br/><label>Dewey Class. No.: </label>001.642/SUM