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