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BA0002. Big Spring Sheet

BA0002. Big Spring Sheet

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BA0002. Big Spring Sheet. G. R. Keller and C. L. V. Aiken, project directors. Scale 1:250,000. This folded transparent map is at the same scale as its corresponding Geologic Atlas of Texas (GAT) sheet and can be superimposed on it to compare gravity information with surface geology. BA0002, $2.00.