Mertens 1965/1967 (ver. 1)
PDF (8.7 MB)
USGS - Historic Quads
Mertens 2010
PDF (11.7 MB)
USGS - US Topo
Mertens 2012
PDF (16.9 MB)
Mertens 2016
PDF (21.7 MB)
Corsicana
1:100,000
Dallas
1:250,000
Files Valley
Italy
Avalon
Hillsboro East
Mertens
Frost
Abbott
Malone
Irene