The Portland Cement Association, Chicago, Illinois, for Concrete
Buildings and Road Construction.
United States Department of Agriculture, Washington, D.C., for Farmers' Bulletins covering the great range of subjects referred to throughout the story.
The Country Gentleman, Philadelphia, Pa., for much helpful data on general farming and stock raising.
K.C. Davis, Knapp School of Country Life, Nashville, Tenn., for a final reading of the proof sheets.