TY  - RPRT
TI  - Information selection systems retrieval replica copies: a-state-of-the-art report
AU  - Bagg, Thomas C
PY  - 1961
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 157
DO  - 10.6028/NBS.TN.157
ER  -