http://dewey.info/scheme/a14/ en
523 Specific celestial bodies and phenomena
523.3 Moon
http://dewey.info/scheme/a14/ vi
523 Các thiên thể và hiện tượng thiên văn cụ thể
523.3 Mặt trăng
http://dewey.info/scheme/a14/ it
523 Specifici corpi e fenomeni celesti
523.3 Luna
http://dewey.info/scheme/edition/e23/ en
523 Specific celestial bodies and phenomena
523.3 Moon
523.31 Constants and dimensions 523.32 Optical, electromagnetic, radioactive, thermal phenomena 523.33 Orbit and motions 523.38 Eclipses
http://dewey.info/scheme/edition/e22/ de
523 Einzelne Himmelskörper und Himmelsphänomene
523.3 Mond
523.31 Konstanten und Dimensionen 523.32 Optische, elektromagnetische, radioaktive, thermische Phänomene 523.33 Umlaufbahn und Bewegungen 523.38 Finsternisse
Dewey Decimal Classification
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