http://dewey.info/scheme/edition/e23/ en
909 World history
909.09 Areas, regions, places in general
909.0942 Islands--civilization 909.097170829 Former communist countries--1990-1999 909.09722 Developed regions 909.09732 Urban areas--civilization 909.0974927 Arab civilization 909.09767 Islamic civilization 909.09821 Occident 909.09822 Mediterranean Region 909.098240831 Indian Ocean region--2000-2019
Dewey Decimal Classification
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