TY  - RPRT
TI  - Potentiometric surface maps of the Sparta Sand, northern Louisiana and southern Arkansas, 1900, 1965, 1975, and 1980
AU  - G.N. Ryals
PY  - 1980
DO  - 10.3133/ofr801180
UR  - https://pubs.usgs.gov/publication/ofr801180
ID  - ofr801180
ER  -