that Lockheed 1962 study "Extended Lunar Operations" (ELO)
ELO is a detailed lunar base development program, schedule spanning from 1962 to 1980
Lunar Probe
1962 to mid-1965. Ranger hard landers collect lunar environment data
mid-1964 and early 1976. Surveyor A soft landers explore the moon
mid-1965 and mid-1976. Surveyor B orbiters map the surface
R&D schedule
1962 to mid-1964. the start of the ELO and concept development
1966. begin Base hardware development
mid-1967. begin of tests to prove hardware reliability
Manned flights
late 1966-early 1968. Apollo B circumlunar and lunar orbital missions.
1968 and 1969. Apollo C Mission, landings with stays no longer than two days.
1969. Saturn C-5s begin delivering ELO modules to the moon
1970 and the first half of 1971. Extended lunar exploration with stays no longer than two weeks
mid-1971. a "interim lunar exploratory base" supporting stays no longer than three months
1974. a "semi-permanent lunar base" with stays no longer than six months.
1975. a permanent lunar base with "unlimited operations" becomes operational.
Source (if you find it)
"Extended Lunar Operations, Lunar Surface", LMSC A013250 (WO/WA 50-5365-0080), Technical Summary Report, 2nd Quarter 1962, Advanced Space Systems Design, Lockheed Missiles & Space Company, June 29, 1962.
"Extended Lunar Operations, Lunar Surface", LMSC A013981 (WO/WA 50-5365-0080), Technical Summary Report, 3rd Quarter 1962, Advanced Space Systems Design, Lockheed Missiles & Space Company, October 3, 1962.
"Extended Lunar Operations, Lunar Surface", LMSC A014292 (WO/WA 50-5365-0080), Technical Summary Report, 4th Quarter 1962, Advanced Space Systems Design, Lockheed Missiles & Space Company, January 18, 1963.
"Lunar Base Technical Summary Report", LMSC 657852 (WO/WA 50-5365-0080), 1st & 2nd Quarters 1963, National Space Programs Office, Lockheed Missiles & Space Company, July 30, 1963.
"A Handbook for Lunar Basing", unpublished draft report, undated (October 1963?).
Source on color picture
death homepage "Romance to Reality" by David S. F. Portree