S69-40740 (July 1969) --- Dr. Ross Taylor (seated), Australian National University, and John Allen, Brown and Root-Northrop technician, review preliminary data from the optical emission spectrograph in the Spectrographic Laboratory of the Physical-Chemical Test Laboratory. Tests were being conducted on lunar surface material collected by astronauts Neil A. Armstrong and Edwin E. Aldrin Jr. during their lunar surface extravehicular activity on July 20, 1969.
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