Grafik prodolzhitel'nosti grazhdanskikh sumerek. (To accompany) Atlas okeanov : Tikhiy Okean = Atlas of the Oceans : Pacific Ocean. 1974.

• Main Authors: Glavnoe Upravlenie Navigat︠s︡ii i Okeanografii Ministerstva Oborony SSSR., Soviet Union. Voenno-Morskoĭ Flot., Gorshkov, Sergei Georgievich, Soviet Union. Voenno-Morskoĭ Flot
• Format: Map
• Language: unknown
• Published: Ministerstva Oborony 1974
• Subjects: Astronomy; Celestial; Data Visualization; Arctic Ocean
• Online Access: https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~353540~90120801; https://media.davidrumsey.com/MediaManager/srvr?mediafile=/Size4/RUMSEY~8~1/205/13622196.jpg

2 graphs on double 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 Indiy...