TY  - BOOK
AU  - Gilchrist,Alan
TI  - The thesaurus in retrieval / 
U1  - 029.5 GIL 
PY  - 1971///.
CY  - London : 
PB  - Aslib, 
KW  - Information retrieval
KW  - Subject headings
KW  - Thesaurus
KW  - Query formulations
N1  - Includes index
ER  -