Intelligent tutoring systems / 
ed. by D. Sleeman and J. S. Brown. 
 - London :  Academic Press,  1982. 
 - 345 p. :  ill. ;  24 cm. 
 - Computers and people series. .
<br/><br/>p. 330. 
<br/><br/><label>ISBN: </label>0126486808 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer-assisted instruction.