TY  - BOOK
TI  - St. Mary's County Symbol AHX Aerial Photography Index (1938)
PY  - 1938///
PB  - United STates Department of Agriculture, Agricultural Adjustment Administration, East Central Division
N2  - 4 photo sheets showing photo mosaic of aerial photograph sheets of St. Mary's County.  Each tile has a number in the upper-right and represents a larger photograph that would be available for study (SMCHS does not have the detailed photographs)
UR  - https://tudorhall.stmaryshistory.org/maps/map-103.pdf
ER  -