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Map I.1.1a. Legal zonation in the Belgian part of the North Sea

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Pecan Springs Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)

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Hall Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)

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Cherokee Quadrangle ; Digital Raster Graphic Topographic Maps: 7.5 Minute Series (Topographic)

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Bend Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)

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Big Valley North Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)

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Big Valley South Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)

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Indian Hills Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)

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Magill Mountain Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)

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Regency Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)