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| Alphabetic subject index | Systematic approach | Site search | System overview |

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60-69 Economic life. Practical crafts

60 Technology. Management studies. Jobs 65 Trade and intercommunication. Shipping
61 Medicine. Health 66 Chemical industry
62 Mechanical engineering. Elektrotechnichs 67 Mechanical industries
63 Agriculture. Forestry. Horticulture. Fishing industry 68 Trade
64 Home and housekeeping 69 Building techniques