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  1. Campbell's 1902 soil culture manual;
    By: Campbell, Hardy Webster,
    Publication info: Holdrege,Nebr., H. W. Campbell,c1902.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Campbell's 1905 soil culture manual; explains how the rain waters are stored and conserved in the soil;
    By: Campbell, Hardy Webster,
    Edition: [Rev. ed.]
    Publication info: Lincoln,Nebr., H. W. Campbell[c1905]
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  3. Progressive agricutlure, 1916, tillage, not weather, controls yield,
    By: Campbell, Hardy Webster,
    Publication info: Lincoln, Neb.,Woodruff bank note co.,1916.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  4. Soil culture primer; a plain and practical discussion of the relation of plants to the soil and the principles of growth; the laws governing the movement of water in the soil and its evaporation from the surface, and the principles of the conservation of soil moisture by cultivation,
    By: Campbell, Hardy Webster, - Haste, Richard A.,
    Publication info: Lincoln, Neb.,Campbell soil culture pub. co.,1914.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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