Publish Year Decade: 1950 - 1959 / Sudoc Stem: CC 1.8 - Blacklight Search Results

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1. F. C. C. figure M3, estimated effective ground conductivity in United States; [map]. Scale 1:2,500,000, approximately 1 in.=40 miles.

Corporate/Agency Authors:: Federal Communications Commission
Publisher:: Federal Communications Commission
Date:: Feb. 1954
SuDoc number:: CC 1.8:C 75