TY  - RPRT
TI  - Large fracture experimentation
AU  - Carl H. Sondergeld
AU  - Hartmut A. Spetzler
PY  - 1981
DO  - 10.3133/ofr81941
UR  - https://pubs.usgs.gov/publication/ofr81941
ID  - ofr81941
ER  -