TY  - RPRT
TI  - Isometric block diagrams in mining geology
AU  - W. D. Johnston
AU  - Thomas B. Nolan
PY  - 1937
DO  - 10.2113/gsecongeo.32.5.550
UR  - https://pubs.usgs.gov/publication/70212726
ID  - 70212726
ER  -