1. Stock Ownership in the United States: Characteristics and Trends;Blume;Survey of Current Business,1974
2. Corporate Income Taxes, Valuation, and the Problem of Optimal Capital Structure;Brennan;Journal of Business,1978
3. J. Crockett I. Friend “Characteristics of Stock Ownership.” Proceedings of the Business and Economic Statistics Section of the American Statistical Association 1963
4. Dun & Bradstreet, Inc. Quarterly Failure Report