Christensen, Borge. <br/><br/>
Beginning Comal  [Books]. 
Borge Christensen. 
 - England  Ellis Horwood Limited.  1985 
 - Pages: 332 
 - Ellis Horwood Series in Computers and Their Applications .
<br/><br/><label>ISBN: </label>0853126305  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>COMAL (computer program language)
<br/><br/><label>Dewey Class. No.: </label>QA/76.73.C64  / CHR