Introduction to the Graphical Kernel System (GKS) 
F.R.A. Hopgood ... [et al.] 
 - London  Academic Press  1983 
 - xi, 200 p.  ill.  24 cm. 
 - A.P.I.C. studies in data processing  no. 19 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer graphics