Öpik, E. J. (1953). A climatological and astronomical interpretation of the ice ages and of the past variations of terrestrial climate. Armagh Observatory.
Chicago Style (17th ed.) CitationÖpik, Ernst Julius. A Climatological and Astronomical Interpretation of the Ice Ages and of the Past Variations of Terrestrial Climate. [Armagh, Ire.]: Armagh Observatory, 1953.
MLA (8th ed.) CitationÖpik, Ernst Julius. A Climatological and Astronomical Interpretation of the Ice Ages and of the Past Variations of Terrestrial Climate. Armagh Observatory, 1953.
Warning: These citations may not always be 100% accurate.