TY  - RPRT
TI  - Horizontal-stress directions in the Denver and Illinois basins from the orientations of borehole breakouts
AU  - R. L. Dart
PY  - 1985
DO  - 10.3133/ofr85733
UR  - https://pubs.usgs.gov/publication/ofr85733
ID  - ofr85733
ER  -