Building materials. Advance chapter from Contributions to economic geology, [calendar year] 1909, pt. 1: Structural materials [with lists of survey publications; articles] by E. F. Burchard, A. H. Purdue, J. A. Udden, T. N. Dale, J. H. Gardner, N. H. Darton, E. W. Shaw, W. C. Alden, E. C. Harder, and F. L. Hess.

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