TY  - RPRT
TI  - Automatic indexing : a state-of-the-art report
AU  - Stevens, Mary Elizabeth
PY  - 1970
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS MONO 91e1970
DO  - 10.6028/NBS.MONO.91e1970
ER  -