1. ACIR. Measuring State Fiscal Capacity: Alternative Methods and their Uses.(Washington, DC, 1986).
2. R.D. Bingham and J.P. Blair (eds) ‘Urban Economic Development’ Urban Affairs Annual Review, vol. 7, (1984).
3. J.S. Bourne and J. Simmons (eds), Systems of Cities (Oxford: Oxford University Press, 1978).
4. Coughlin, Keene and Associates, Tourists in Philadelphia 1987, A Report to the Philadelphia Convention and Visitors Bureau (March 1988).
5. S.B. Friedmann and A.J. Darragh, ‘Economic Development’, in F. S. So (ed.) The Practice of Local Government Planning, second edition (Washington, DC: International City Managers Association, 1988).