Title: Department of State, Circular, Project Clear Sky, February 6, 1964, Secret, NARA.
Creator: Department of State
Date in Source: February 6, 1964
Subject: Great Britain - Hong Kong - Nuclear weapons test detection - Atomic energy detection system - AEDS - AFTAC - Expansion of nuclear test detection system - Nuclear Test Ban Treaty - U.S. Air Force - Site surveys
Format: 2 p.