TY  - BOOK
AU  - Chan,Lois Mai
TI  - Subject headings : : principles of structure and policies for application 
U1  - 025.3 
PY  - 1990///
CY  - Washington D.C
PB  - Library of Congress, 
KW  - Subject headings, Library of Congress
KW  - Tiêu đề chủ đề
N1  - Advances in Library Information Technology Issue Number 3
ER  -