REFERENCES
Helfert, M.R., 1989. NASA human-directed observations on the earth from space: and
introduction, Geocarto International, Vol. 1, pp. 3-5.
Lund, H.G., 1988. Workshop Recommendations, Proceedings of the Second Forest Service
Remote Sensing Applications Conference, Slidell, LA and NSTL, MS, pp. 396-403.