TY  - BOOK
AU  - Wellisch, Hans.
AU  - Wilson, Thomas D.
TI  - Subject retrieval in the seventies: : New directions
T2  - Contribution in librarianship and information science
SN  - 0837163226
U1  - 025.33 
PY  - 1972///
CY  - USA: 
PB  - Greenwood Publishing Company, 
KW  - Classification
KW  - Indexing
KW  - Library science
KW  - Subject retrieval
ER  -