Topographic map of <a href="https://en.wikipedia.org/wiki/Plant%C3%A9_(crater)" class="extiw" title="en:Planté (crater)">Planté</a> crater, on the far side of the moon.  Figure 2-72, with original caption, "Contour map of the model of convergent photography."  Original scale 1:200,000. Leveling points (V1, V2, V3) were assumed to be at an arbitrary elevation of 10,000 m.
NASA
<a rel="nofollow" class="external text" href="https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700005062.pdf">Analysis of Apollo 8 Photography and Visual Observations</a>, NASA SP-201, compiled by NASA Manned Spacecraft Center, 1969