TY  - RPRT
TI  - The theory and prototype development of a stress-monitoring system
AU  - H.S. Swolfs
AU  - J.B. Walsh
PY  - 1990
DO  - 10.1785/bssa0800010197
UR  - https://pubs.usgs.gov/publication/70015912
ID  - 70015912
ER  -