Secular Change in the Financial Services IndustryS. I. Greenbaum and C. F. Haywood
Journal of Money, Credit and Banking
Vol. 3, No. 2, Part 2: 1969 Conference of University Professors (May, 1971), pp. 571-589
http://www.jstor.org/discover/10.2307/1991167?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=47699118733257