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
U1  - 025.46 
PY  - 1977///
CY  - Paris
PB  - Unesco
KW  - Unesco thesaurus
ER  -