TY  - BOOK
AU  - Cleverdon, C. W.
TI  - Report on the first stage of an investigation into the comparative efficiency of indexing systems
T2  - ASLIB Cranfield Research Project
U1  - 029.5 
PY  - 1960///
CY  - Cranfield, Eng.
PB  - ASLIB
KW  - Indización
ER  -