Peebles, C., & Allen, N. (2011). Eleven seconds into the unknown: A history of the hyper-X program. American Institute of Aeronautics and Astronautics.

Peebles, Curtis, and Ned Allen. Eleven Seconds into the Unknown: A History of the Hyper-X Program. Reston, Va.: American Institute of Aeronautics and Astronautics, 2011.

Peebles, Curtis, and Ned Allen. Eleven Seconds into the Unknown: A History of the Hyper-X Program. American Institute of Aeronautics and Astronautics, 2011.