http://dewey.info/scheme/a14/ en
306.7 Sexual relations
306.73 General institutions
http://dewey.info/scheme/a14/ vi
306.7 Quan hệ tình dục
306.73 Các thể chế nói chung
http://dewey.info/scheme/a14/ it
306.7 Relazioni sessuali
306.73 Istituzioni generali
http://dewey.info/scheme/edition/e23/ en
306.7 Sexual relations
306.73 General institutions
306.730285 Dating (Social practice)--computer applications 306.732 Celibacy 306.733 Premarital sexual relations 306.734 Courtship and engagement 306.736 Extramarital relations
Dewey Decimal Classification
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