TY  - BOOK
AU  - Perreault,Jean M.
TI  - Towards a theory for UDC: essays aimed at structural understanding and operational improvement
SN  - 0208008748
U1  - 025.43 
PY  - 1969///
CY  - Hamden, Conn.
PB  - Archon Books
KW  - Classification, Universal decimal
N1  - Bibliographical footnotes
ER  -