4Linchfield, N. Economic in Urban Conservation. Cambridge University Press, 1988,P29.
5Rypkema. D. D. Rethinking Economic Values, in Lee, A. J. (ed.) Past Meets Future : Saving America's historic Envi- ronments, National Trust for Historic Preservation/The Preservation Press, 1992.
6Fitch, J. M. Historic Reservation: Curatorial management of the Built Environment. University Press of Virginia, 1990, PP46 - 47. .
7Yeomans D. Rehabilitation and Historic Preservation: A Comparison of British and American approaches.Town Planning Review, Vol. 65(2), 1994.