TY  - RPRT
TI  - Bibliography with abridged abstracts of subsurface gravimetry (especially borehole) and corresponding in-situ rock density determinations
AU  - Stephen L. Robbins
PY  - 1980
DO  - 10.3133/ofr80710
UR  - https://pubs.usgs.gov/publication/ofr80710
ID  - ofr80710
ER  -