"1960Z"^^ . . "1923Z"^^ . . . . . "Ruppelt, Edward"@en . "1960-09-15Z"^^ . . "Edward J. Ruppelt"@en . "1923-07-17Z"^^ . "Edward J. Ruppelt (July 17, 1923 \u2013 September 15, 1960) was a United States Air Force officer probably best known for his involvement in Project Blue Book, a formal governmental study of unidentified flying objects."@en . . "United States of America" . "American UFO researcher" .