TY  - BOOK
AU  - Wellisch, Hans(Hanan
AU  - Wilson, Thomas D
TI  - Subject Retrieval in the Seventies: New Directions
SN  - 0837163226
U1  - 025.43 
PY  - 1972///
CY  - New York
PB  - Greenwoood Press Publishers
KW  - Librarianship and Information Science
ER  -