مراجع
- ^ Hoffman، Sarah (7 مارس 2019). "A Space Pioneer Charts A Course For Future Astronauts". KCTS9. مؤرشف من الأصل في 2020-02-01. اطلع عليه بتاريخ 2019-03-11.
He became a satellite countdown controller, worked on classified missions and earned a position with the competitive Manned Spaceflight Engineer program. While training as an astronaut, he witnessed the faces of NASA's space shuttle program shift to include women and minorities, along with the white men who first inspired him.
- ^ [1], Livingston Holder on astronautix.com نسخة محفوظة 3 مارس 2016 على موقع واي باك مشين.
- ^ [2],"Astronaut visits Alaska schools", Juneau Empire نسخة محفوظة 3 مارس 2016 على موقع واي باك مشين.
