TY  - RPRT
TI  - Program to prepare standard figures for grade-tonnage models on a Macintosh
AU  - Donald A. Singer
AU  - James D. Bliss
PY  - 1990
DO  - 10.1016/b978-0-08-040261-1.50026-x
UR  - https://pubs.usgs.gov/publication/70197266
ID  - 70197266
ER  -