Books by Harry F. Robertson:
Books in the extended shelves:
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Robertson, Harry F.: Expanded clay and shale lightweight aggregate industry in the south-central United States (U.S. Dept. of the Interior, Bureau of Mines, 1964), also by W. G. Diamond, Thomas R. Early, and United States Bureau of Mines (page images at HathiTrust)- Robertson, Harry F.: Iron and steel scrap in Arkansas, Kansas, Louisiana, Mississippi, Missouri, Oklahoma and Texas (U.S. Dept. of the Interior, Bureau of Mines, 1966), also by Frank B. Fulkerson and United States Bureau of Mines (page images at HathiTrust)
Find more by Harry F. Robertson at your library, or elsewhere.