TY  - BOOK
AU  - Perreault, Jean M.
TI  - Towards a theory for UDC; essays aimed at structural understanding and operational improvement
U1  - 025.45' .001 K9 
PY  - 1969///
CY  - London
PB  - Clive Bingley
KW  - Jean M. Perreault
KW  - Library science
ER  -