Llana, Andres. <br/><br/>
IBM's communications standards / 
Andres Llana. 
 - Charleston, S.C. :  Computer Technology Research Corp.,  1990. 
 - 110 p. ;  28 cm. 
<br/><br/><label>ISBN: </label>0927695561 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.<br/>SNA (Computer network architecture).