Não informado. Soviet-bloc research in geophysics, astronomy ans space. Joint Publications Research Service.
Citação do estilo Chicago (17ª ed.)Não informado. Soviet-bloc Research in Geophysics, Astronomy Ans Space. Arlington, Wash: Joint Publications Research Service.
Citação MLA (8ª ed.)Não informado. Soviet-bloc Research in Geophysics, Astronomy Ans Space. Joint Publications Research Service.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.