Perreault, Jean M.,  1931-2001. <br/><br/>
Towards a theory for UDC;  essays aimed at structural understanding and operational improvement 
[by] J. M. Perreault. 
 - Hamden, Conn. :  Archon Books,  1969. 
 - 241 p. :  illus. ;  23 cm. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>ISBN: </label>0208008748 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Universal decimal.
<br/><br/><label>Dewey Class. No.: </label>025.43  / PET 1969