TY  - BOOK
AU  - Perreault,Jean M.
TI  - An introduction to UDC
T2  - Programmed texts in library and information science
SN  - 0851570860
U1  - 025.43 16
PY  - 1969///
CY  - [Hamden, Conn.]
PB  - Archon Books
KW  - Classification, Universal decimal
KW  - Programmed instruction
ER  -