TY  - BOOK
AU  - Lopes,Maria Ines
AU  - Beall,Julianne
ED  - International Federation of Library Associations and Institutions.
TI  - Principles underlying subject heading languages (SHLs)
PY  - 1997///
CY  - Frankfurt
PB  - IFLA UBCIM Programme
KW  - Subject headings
KW  - Poly lot
ER  -