TY  - RPRT
TI  - Interactive computer methods for generating mineral-resource maps
AU  - James Alfred Calkins
AU  - A.S. Crosby
AU  - T.E. Huffman
AU  - A. L. Clark
AU  - G.T. Mason
AU  - R.J. Bascle
PY  - 1980
DO  - 10.3133/cir815
UR  - https://pubs.usgs.gov/publication/cir815
ID  - cir815
ER  -