http://dewey.info/scheme/a14/ en
363 Other social problems and services
363.9 Population problems
http://dewey.info/scheme/a14/ vi
363 Các vấn đề xã hội và dịch vụ xã hội khác
363.9 Vấn đề dân số
http://dewey.info/scheme/a14/ it
363 Altri problemi e servizi sociali
363.9 Problemi demografici
http://dewey.info/scheme/edition/e23/ en
363 Other social problems and services
363.9 Population problems
363.91 Population quantity 363.92 Population quality 363.96 Birth control 363.97 Sterilization
Dewey Decimal Classification
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