TY  - RPRT
TI  - Preliminary stress measurements in central California using the hydraulic fracturing technique
AU  - Mark D. Zoback
AU  - J. H. Healy
AU  - J. C. Roller
PY  - 1977
DO  - 10.1007/bf01637101
UR  - https://pubs.usgs.gov/publication/70001087
ID  - 70001087
ER  -