TY  - BOOK
AU  - Heim, Mary Ellen
AU  - University of Illinois Gradute School of Library and Information Sci ence.
TI  - Open twenty-four hours: a case study 
SN  - 0276176
U1  - 025 
PY  - 1990///
CY  - Illinois
PB  - University of Illinois Graduate School of Library and Information Science
KW  - Library service agencies
ER  -