2A parcel - based Multipurpose GIS in city of Niagar Falls, New York, presemed in The 7th New York state GIS confemce, Albany,New York. 1991.
3G. Noren, computer Assisted Real Estate Management A brief description and some examples of operation and maintenance of buildings and utilities, FIG. international Federation of surveyors, xv111 international congress of surveyors. Toronto. Canada Vol.976-89 1990.