TY  - BOOK
AU  - Perreault, J.M.
TI  - Towards a theory for UDC: essays aimed at structural understanding and operation development
U1  - 025.432 PER-; 
PY  - 1969///
CY  - London
PB  - Clive bingley
KW  - Classification, Universal decimal - Study and teaching
KW  - Classification - Books
KW  - Library education
KW  - Library science
ER  -