Descriptive catalogue of the road models of the Office of Public Roads . Model of a Bituminous Macadam Road—Penetration Method. Bui. 47, Office of Public Roads, U. S. Dept. of Agriculture. Plate Model of a Bituminous Macadam Road—Mixing Method. I Bui. 47, Office of Public Roads, U. S. Dept. of Agriculture. Plate XII.

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License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, bookiddescriptivec, bookyear1913