TY  - BOOK
AU  - Heaps,H.S.
TI  - Information retrieval, computational and theoretical aspects
T2  - Library and information science
SN  - 0123357500
U1  - 029.7 
PY  - 1978///
CY  - New York
PB  - Academic Press
KW  - Information Storage
KW  - Retrieval systems
ER  -