http://dewey.info/scheme/a14/ en
550 Earth sciences
550.9 Historical, geographic, persons treatment
http://dewey.info/scheme/a14/ vi
550 Khoa học về trái đất
550.9 Lịch sử, địa lý, con người
http://dewey.info/scheme/a14/ it
550 Scienze della Terra
550.9 Storia, geografia, persone
Dewey Decimal Classification
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