TY  - RPRT
TI  - Geologic research in support of sustainable agriculture
AU  - L. P. Gough
AU  - J. R. Herring
PY  - 1993
DO  - 10.1016/0167-8809(93)90013-f
UR  - https://pubs.usgs.gov/publication/70017393
ID  - 70017393
ER  -