TY  - BOOK
AU  - Wellisch,Hans H.,1920-
AU  - Wilson,Thomas D
TI  - Subject retrieval in the seventies: new directions
SN  - 0837163226
PY  - 1972///
CY  - Westport, Conn.
PB  - Greenwood Press
KW  - Subject cataloging
KW  - Congresses
KW  - Classification
KW  - Books
KW  - Information retrieval
N1  - Includes bibliographies
ER  -