Wilson, Thomas D <br/><br/>
An introduction to chain indexing 
by T. D. Wilson 
 - London  Clive Bingley  1971 
 - 85 p. ; 23 cm. 
<br/><br/>Bibliography: p. 84. 
<br/><br/><label>ISBN: </label>0851571093 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chain indexing--Programmed instruction