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Subclass HD
| HD28-9999 | Industries. Land use. Labor | |||
| HD28-70 | Management. Industrial management | |||
| HD39-40.7 | Capital. Capital investments | |||
| HD41 | Competition | |||
| HD45-45.2 | Technological innovations. Automation | |||
| HD47-47.4 | Costs | |||
| HD49-49.5 | Crisis management. Emergency management. Inflation | |||
| HD50-50.5 | Delegation of authority. Decentralization. Span of control | |||
| HD56-57.5 | Industrial productivity | |||
| HD58 | Location of industry | |||
| HD58.7-58.95 | Organizational behavior, change and effectiveness. Corporate culture | |||
| HD59-59.6 | Public relations. Industrial publicity | |||
| HD60-60.5 | Social responsibility of business | |||
| HD61 | Risk in industry. Risk management | |||
| HD62 | Standardization. Simplification. Waste | |||
| HD62.2-62.8 | Management of special enterprises | |||
| HD66-66.2 | Work groups. Team work in industry. Quality circles | |||
| HD69 | Other Including business consultants, capacity, size of industries, etc. | |||
| HD72-88 | Economic growth, development, planning | |||
| HD101-1395.5 | Land use | |||
| Land tenure | ||||
| HD1286-1289 | Communal ownership | |||
| HD1290-1291 | Municipal ownership | |||
| HD1301-1313 | Nationalization (Agrarian socialism) | |||
| HD1326-1329 | Large holdings | |||
| HD1330-1331 | Landlord and peasant | |||
| HD1332-1333.5 | Land reform. Agrarian reform | |||
| HD1334-1335 | Consolidation of land holdings | |||
| HD1336-1339 | Small holdings. Peasant proprietors. Parcellation | |||
| HD1361-1395.5 | Real estate business | |||
| HD1401-2210 | Agriculture | |||
| HD1428-1431 | International cooperation | |||
| HD1470-1476 | Size of farms | |||
| HD1478 | Sharecropping | |||
| HD1483-1486 | Agricultural associations, societies, etc. | |||
| HD1491-1491.5 | Cooperative agriculture | |||
| HD1492-1492.5 | Collective farms | |||
| HD1493-1493.5 | Government owned and operated farms. State farms. Sovkhozes | |||
| HD1501-1542 | Agricultural classes Including farm tenancy, agricultural laborers | |||
