Oblique view of Messier, Messier A, and Messier B craters in Mare Fecunditatis, on the moon.
NASA
1969
Apollo Flight Journal, Apollo 10, Photography Index, <a rel="nofollow" class="external text" href="https://www.hq.nasa.gov/office/pao/History/afj/ap10fj/photos/29-p.html">70-mm magazine P</a>, image <a rel="nofollow" class="external text" href="https://www.hq.nasa.gov/office/pao/History/afj/ap10fj/photos/29-p/as10-29-4256.jpg">AS10-29-4256</a>