Handberg, R.(1997). The return of the American military to crewed spaceflight: Hypersonic and other visions. Space Policy, 13(4), 295-304. doi:10.1016/s0265-9646(97)00029-5
MLA CitationHandberg, Roger. "The Return of the American Military to Crewed Spaceflight: Hypersonic and Other Visions". Space Policy, 13.4 ( 1997 ): 295-304.
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