TY  - RPRT
TI  - Limitations of determining density or magnetic boundaries from the horizontal gradient of gravity or pseudogravity data
AU  - V. J. S. Grauch
AU  - L. Cordell
PY  - 1987
DO  - 10.1190/1.1442236
UR  - https://pubs.usgs.gov/publication/70014755
ID  - 70014755
ER  -