Illustration of the relative sizes of the one-man Mercury spacecraft, the two-man Gemini spacecraft, and the three-man Apollo spacecraft. Also shows line drawing of launch vehicles (Saturn V, Titan II and Atlas-D) to show their relative size to each other and the position of the spacecraft at launch (highlighted at top). #nasa

<p><span class="mw-mmv-source-author"><span class="mw-mmv-author">D. Meltzer (signature on image)</span> - <span class="mw-mmv-source"><a class="external free" href="https://archive.org/details/S64-22331" rel="nofollow">https://archive.org/details/S64-22331</a></span></span></p>;