Heap, N. W. <br/><br/>
An Introduction to OSI / 
N. W. Heap. 
 - Oxford :  Blackwell Scientific Publications,  1993. 
 - 146 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0632026995 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Computer networks.