TY  - RPRT
TI  - The relation of geology to stress changes caused by underground excavation in crystalline rocks at Idaho Springs, Colorado
AU  - Fitzhugh T. Lee
AU  - John F. Abel
AU  - Thomas C. Nichols
PY  - 1976
DO  - 10.3133/pp965
UR  - https://pubs.usgs.gov/publication/pp965
ID  - pp965
ER  -