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Sources
kevinforsyth.net
To Reach the High Frontier: A History of U.S. Launch Vehicles
"A valuable contribution to the field of aerospace literature," this book includes an extensive overview of Delta history and development along with chapters on Atlas, Titan, Scout, Space Shuttle, and much more.
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Many other excellent books about spaceflight are recommended here.
19-Apr-99 | Delta flight 268 – Landsat-7
Landsat-7 lifted off aboard its Delta 7920 at the very opening of its first launch window on Thursday, 15 April, at 18:32:00.288 UTC. The spacecraft was placed successfully into its proper orbit and is in excellent health. The next few weeks will be spent on systems checkout and calibration. The Landsat program, frequently referred to as “the central pillar of the national remote sensing capability,” has been continuously providing Earth images in visible and infrared wavelengths since 1972.