Allen, D. J., & Bekemeyer, L. G. "Design of the Saturn S-IV Stage Propellant Utilization System.". University of Alabama in Huntsville Archives.
Chicago Style CitationAllen, D. J., and L. G. Bekemeyer. "Design of the Saturn S-IV Stage Propellant Utilization System.". University of Alabama in Huntsville Archives.
MLA CitationAllen, D. J., and L. G. Bekemeyer. "Design of the Saturn S-IV Stage Propellant Utilization System.". University of Alabama in Huntsville Archives.
Warning: These citations may not always be 100% accurate.