Descriptive catalogue of the road models of the Office of Public Roads . Model of a Gravel Road. Bui. 47, Office of Public Roads, U. S. Dept. of Agriculture. Plate IX,. Model of a Water-Bound Macadam Road. 47, Office of Public Roads, U. S. Dept. of Agricultur Plate X.

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Keywords: ., bookcentury1900, bookdecade1910, bookiddescriptivec, bookyear1913