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Lord 1987, p. 26. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 345. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 353. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 358. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
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Hänel, Michael (16 September 2019). "Raumstationen: Ulf Merbold". planet-wissen.de (in German). Archived from the original on 29 July 2022. Retrieved 29 July 2022.
Lord 1987, p. 20. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 26. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
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Lord 1987, p. 353. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 358. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
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Lord 1987, p. 20. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 26. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 345. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 353. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 358. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.
Lord 1987, p. 360. Lord, Douglas R. (1987). Spacelab, an international success story. NASA SP; 487. Washington, DC: Scientific and Technical Information Division, National Aeronautics and Space Administration. OCLC13946469. Archived from the original on 21 March 2022. Retrieved 1 April 2022.