1. Cluster Analysis for Applications, Academic Press, New York, 1973.
2. Barriers to New Competition, Harvard University Press, Cambridge, MA, 1956.
3. Industrial Organization, 2nd edn, John Wiley & Sons, New York, 1968.
4. Best's Aggregates and Averages. Reported annually.
5. Best's Insurance Reports Property-Casualty. Reported annually.