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Aerial view of Mauna Loa Observatory site, 1978 (DI02084)
Climax Observatory, circa 1965 (DI02074)
Eclipse expedition, San Carlos Yautepec, Mexico, 1970 (DI02078)
High Altitude Observatory team, 1940s and 1950s (DI02073)
Mauna Loa Observatory, 1978 (DI02083)