http://dewey.info/scheme/a14/ en
551.4 Geomorphology and hydrosphere
551.42 Islands and reefs
http://dewey.info/scheme/a14/ vi
551.4 Địa mạo học và thuỷ quyển
551.42 Đảo và rạn đá ngầm
http://dewey.info/scheme/a14/ it
551.4 Geomorfologia e idrosfera
551.42 Isole e scogli
http://dewey.info/scheme/edition/e23/ en
551.4 Geomorphology and hydrosphere
551.42 Islands and reefs
551.423 Barrier islands 551.424 Reefs
http://dewey.info/scheme/edition/e22/ de
551.4 Geomorphologie und Hydrosphäre
551.42 Inseln und Riffe
551.423 Nehrungsinseln 551.424 Riffe
Dewey Decimal Classification
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