TY  - BOOK
AU  - Christ, John M
TI  - Concepts and subject headings: : Their relation in information retrieval and library science
SN  - 0-8108-0491-3
PY  - 1972///
CY  - Metuchen: 
PB  - The Scarecrow Press, Inc.
KW  - Library science
KW  - Subject headings
ER  -