http://dewey.info/scheme/e22/
330 Economics
331 Labor economics
http://dewey.info/scheme/a14/ 331 Labor economics
331.01 Philosophy and theory 331.1 Labor force and market 331.2 Conditions of employment 331.3 Workers by age group 331.4 Women workers 331.5 Special categories of workers other than by age or sex 331.6 Categories of workers by ethnic and national origin 331.7 Labor by industry and occupation 331.8 Labor unions, labor-management bargaining and disputes
Dewey Decimal Classification
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