TY  - RPRT
TI  - Maps showing mined-out areas and property ownership, land-pebble phosphate district, Hillsborough and Polk Counties, Florida
AU  - J.B. Cathcart
AU  - E.L.M. Ward
PY  - 1953
DO  - 10.3133/ofr5335
UR  - https://pubs.usgs.gov/publication/ofr5335
ID  - ofr5335
ER  -