TY  - RPRT
TI  - Map of Polk County, Florida, showing contours on the piezometric surface of the Floridan aquifer
AU  - Herbert G. Stewart
PY  - 1961
DO  - 10.3133/ofr61160
UR  - https://pubs.usgs.gov/publication/ofr61160
ID  - ofr61160
ER  -