Title: Gidrografy v Arktike i Antarktike
Subjects: History, Hydrography, Hydrographic surveying, Severnai͡a gidrograficheskai͡a ėkspedit͡sii͡a (1924-1986), Mezhdunarodnai͡a antarkticheskai͡a ėkspedit͡sii͡a (13th : 1967-1968)
Places: Arctic Ocean, Antarctic Ocean
Time periods: 20th century