TY  - BOOK
AU  - Williams, Joel,
ED  - American Library Association :
TI  - Library statistics: a handbook of concepts, definitions, and ter minology 
U1  - 026.31 WIL 
PY  - 1966///
CY  - Chicago
PB  - American Library Association
KW  - Library statistics
N1  - Includes bibliographical references ( p. 153-154)
ER  -