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Filters: Tags: Preliminary (X) > Date Range: {"choice":"year"} (X)

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    map background search result map search result map USGS 1:10000-scale Quadrangle for Aguadilla SO, PR 1950 USGS 1:30000-scale Quadrangle for Arecibo, PR 1942 USGS 1:30000-scale Quadrangle for Barceloneta, PR 1942 USGS 1:30000-scale Quadrangle for Carolina, PR 1941 USGS 1:30000-scale Quadrangle for Vega Alta, PR 1940 USGS 1:62500-scale Quadrangle for Fort Reno, OK 1941 USGS 1:10000-scale Quadrangle for Aguadilla SO, PR 1950 USGS 1:30000-scale Quadrangle for Arecibo, PR 1942 USGS 1:30000-scale Quadrangle for Barceloneta, PR 1942 USGS 1:30000-scale Quadrangle for Carolina, PR 1941 USGS 1:30000-scale Quadrangle for Vega Alta, PR 1940 USGS 1:62500-scale Quadrangle for Fort Reno, OK 1941