TY  - BOOK
AU  - Aitchison, Jean
TI  - Unesco thesaurus: A structured list of descriptors for indexing and retrieving literature in the fields of education science,social science,culture and communication.2v 
PY  - 1977///
CY  - Unesco
KW  - Documentation
KW  - Library Science
N1  - 2
ER  -