Matthew Petroff:
Surficial Geologic Map of the Winsted Quadrangle, Litchfield and Hartford Counties, Connecticut
Matthew Petroff:
Aeromagnetic Map of the Winsted Quadrangle and Parts of the Torrington and Tolland Center Quadrangles, Litchfield and Hartford Counties, Connecticut
Matthew Petroff:
Map of the City of Baltimore
Matthew Petroff:
Soil Survey
Matthew Petroff:
West Hill Pond Bathymetry
Matthew Petroff:
Map Detail
Matthew Petroff:
Quarries
Matthew Petroff:
City of Baltimore Topographical Survey
Matthew Petroff:
Mount Vernon
Matthew Petroff:
Homewood
Matthew Petroff:
Johns Hopkins Hospital
Matthew Petroff:
City Atlas of Baltimore, Maryland, and Environs