1. Preliminary data on the lunar samples returned by the automatic station Luna 20,1972
2. Apollo 16 panoramic photos 5206-5211 (stereo pair), taken from an altitude of 112 km on revolution 63. Sun angle is 76°,1972
3. J. Warner, A.M. Reid, W.I. Ridley and R.W. Brown, Mineralogy and petrology of Luna 20 soil (abs.), submitted to Geol. Soc. Am. 1972 Annual Meeting (Minneapolis).
4. Certificate of Sample L-2009, which accompanies the Russian sample data provided by the Curator of Lunar Samples, NASA, Manned Spacecraft Center, Houston, Texas.
5. The Apollo 16 lunar samples: A petrographic and chemical description of samples from the lunar highlands;Lunar Sample Preliminary Examination Team;Science,1972