“ Peasant proprietors. Parcellation 1361-1395.5..........Real estate business 1401-2210..........Agriculture 1428-1431..........International cooperation 1470-1476..........Size of farms 1478..........Sharecropping 1483-1486..........Agricultural associations, societies, etc. 1491-1491.5..........Cooperative agriculture 1492-1492.5..........Collective farms 1493-1493.5..........Government owned and operated farms. State farms. ”

“ Social security. Pension 7255-7256..........Vocational rehabilitation. Employment of people with disabilities 7260-7780.8..........Industrial hygiene. Industrial welfare 7795-8027..........Labor policy. Labor and the state 8031..........Labor in politics. Political activity of the working class 8038..........Professions (General) . Professional employees 8039..........By industry or trade 8045-8943..........By region or country 9000-9999..........Special industries and trades 9000-9495..........Agricultural industries 9502-9502.5..........Energy industries. Energy policy. ”