1. Automatic Classification and Indexing;Hoyle,1969
2. Measuring the reliability of subject classification by men and machines;Borko;Am. Docum.,1964
3. Indexer Consistency Tests-Origin, Measurements, Results and Utilization;Hooper,1965
4. P. Zunde and M.E. Dexter: Indexing Consistency and Quality. PB 185400. School of Information Science, Georgia Institute of Technology, Atlanta, Georgia.
5. Breaking the Cost Barrier in Automatic Classification;Doyle,1966