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A standard library for modeling satellite orbits on a microcomputer/ : Beutel, Kenneth L. : Free Download, Borrow, and Streaming : Internet Archive
Kenneth L. Beutel's master thesis, Naval Postgraduate School, 1988-03.Fri Mar 7 12:15:45 2025 - permalink -
Found via the post https://www.hpmuseum.org/forum/thread-23225.html on the MoHP forum.- https://archive.org/details/standardlibraryf00beut/page/62/mode/2up?view=theater