Janson, Bette R.; NASA; Scientific and Technical Information Division (1988-03-01). Ritchie, Eleanor H.; Saegesser, Lee D., ed. Astronautics and Aeronautics, 1985: A Chronology(PDF). Washington, DC.: United States Government Printing Office. hlm. 282. Diarsipkan dari versi asli(PDF) tanggal 2021-01-07. Diakses tanggal 2021-08-09.
Janson, Bette R.; NASA; Scientific and Technical Information Division (1988-03-01). Ritchie, Eleanor H.; Saegesser, Lee D., ed. Astronautics and Aeronautics, 1985: A Chronology(PDF). Washington, DC.: United States Government Printing Office. hlm. 282. Diarsipkan dari versi asli(PDF) tanggal 2021-01-07. Diakses tanggal 2021-08-09.