FBI-UAP-D013：华盛顿州"UFO"调查（1952–1960年）
FBI-UAP-D013, Washington State ‘UFO’ Investigation, 1952-1960
一份1952年至1960年间华盛顿州"UFO"调查的FBI档案。
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This file details an investigation of various sightings of Unidentified Flying Objects (UFOs) in Washington state between July 1952 and August 1960. This file includes memoranda and correspondence between the Federal Bureau of Investigation and the U.S. Air Force regarding UFO sightings.
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原始文件托管于美国战争部服务器，链接来自 war.gov。