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Tow Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
Pontotoc Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
San Saba Peak Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
Bowser Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)
Hall Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)
Pecan Springs Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)
Dalhem - Herve. Carte géologique de Wallonie à l'échelle 1:25.000. 42/3-4 ; Dalhem - Herve. Geological map of Wallonia at the scale 1:25.000. 54/8
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Tongres-Heerderen. Carte géologique de Wallonie. 34/5-6 ; Tongres-Herrederen. Geological map of Wallonia. 34/5-6
Chimay - Couvin. Carte géologique de Wallonie à l'échelle 1:25.000. 57/7-8 Notice explicative ; Chimay - Couvin. Geological map of Wallonia at the scale of 1:25.000. 57/7-8. Leafle...
Fredonia Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)