Grafik momentov zakhoda solntsa. (to accompany) Atlas okeanov : Atlanticheskiy i Indiyskiy Okeany 1977.

• Main Authors: Gorshkov, Sergei Georgievich, Soviet Union. Voenno-Morskoĭ Flot, Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR.
• Format: Map
• Language: unknown
• Published: Ministerstva Oborony 1977
• Subjects: Astronomy; Celestial; Data Visualization; Arctic Ocean
• Online Access: https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~354923~90121893; https://media.davidrumsey.com/MediaManager/srvr?mediafile=/Size4/RUMSEY~8~1/205/13623194.jpg

2 graphs on 2 sheet. Showing annual duration of civil twilight. Includes text. 1974 - 1980. Three volumes produced by the USSR War Department =Ministerstvo oborony Sovetskogo Soyuza, with volumes on the Pacific Ocean= Tikhiy okean (1974), the Atlantic and Indian Oceans = Atlanticheskogo i Indiyskogo...