TY  - BOOK
AU  - Borko,Harold
AU  - Bernier,Charles L.
TI  - Abstracting concepts and methods
T2  - Library and information science series
SN  - 0121186504
U1  - 029.4 
PY  - 1975///
CY  - New York
PB  - Academic Press, 
KW  - EXTRACTOS
ER  -