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U.S. Code
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TITLE 50 - WAR AND NATIONAL...
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CHAPTER 18—AIR-WARNING SCREEN (§§ 491 – 494)
CHAPTER 18—AIR-WARNING SCREEN (§§ 491 – 494)
§ 491. Establishment and development of land-based air warning and control installations and facilities; extent of appropriation; procurement of communication services
§ 492. Acquisition of land
§ 493. Authorization of appropriations
§ 494. Supervision and control of project