1. American Hospital Association (various editions)Hospital Statistics, American Hospital Association, Chicago.
2. American Association of Fund-Raising Counsel Inc. (various editions)Giving USA: A Compilation of Facts and Trends on American Philanthropy, American Association of Fund-Raising Counsel Inc., New York.
3. Commission on Private Philanthropy and Public Needs (1975)Giving in America: Toward a Stronger Voluntary Sector, Department of the Treasury, Washington, D.C.
4. Commission on Private Philanthropy and Public Needs (1977)Research Papers, Volume 1, History, Trends, and Current Magnitudes, Department of the Treasury, Washington, D.C.
5. Conference Board (various editions)Annual Survey of Corporate Contributions, The Conference Board, New York.