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| Subject |
|---|
| hairy vetch [1] |
| Handbooks, manuals, etc. [1] |
| Hay Preservation [1] |
| Health [1] |
| Heating [8] |
| Heating and Ventilation [1] |
| Heifers [1] |
| History [1] |
| Home Insulation [1] |
| Home Safety [3] |
| Horticultural Crop Storage [1] |
| House Buying [1] |
| Housing [1] |
| Hydroelectric Power [1] |