Fakundiny, R.H., 1980. Marketing Analysis of the Sand and Gravel Business Using Central-place Theory and Surficial Geology Maps, in: Dunn, J.R., Fakundiny, R.H., Rickard, L.V. (Eds.), Proceedings; Fourteenth Annual Forum On The Geology Of Industrial Minerals. The University of the State of New York, Albany, New York, pp. 40-52.