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टेम्पलेट:Infobox space program

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  1. उद्धरण खराबी:Invalid <ref> tag; no text was provided for refs named ApolloCost
  2. Thomas, Ryland; Williamson, Samuel H. (2018). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved January 5, 2018. {{cite web}}: Cite has empty unknown parameters: |postcript= and |last-author-amp= (help) United States Gross Domestic Product deflator figures follow the Measuring Worth series.