Perreault, Jean M.,  1931- <br/><br/>
Towards a theory for UDC / 
by J. M. Perreault. 
 - London:  Clive Bingley,  1969. 
 - 241 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>208008748a 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Universal decimal