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acid Agricultural Experiment Station Amer Animal Husbandry Applied bacteria biology bookkeeping breed bulletins Chap chemical chemistry Civic Biology College of Agriculture color commercial geography commercial law composition corn course crop rotation crops dairy cattle diseases Eckles economic electric engine equipment farm animals Farm management feeding Ginn grade Gregg Gregg shorthand hard water Harper heat Henry & Morrison high school Holstein-Friesian hydrogen importance industry lessons Lippincott livestock Macmillan Manual arts Manual of farm material ment metals Method milk Minnesota Montgomery Organization outline oxide physical plants Plumb poultry practice preparation principles problems properties pupils repair Rural seed selection sheep husbandry shorthand silage soil South Dakota teacher tion topics typewriting U. S. D. A. Bui U. S. D. A. Yearbook United vocational Washburn weeks Wilson & Warburton Wisconsin