The Online Books Page

Books by Robert L. Virta:

Books in the extended shelves:

• Virta, Robert L.: Crystalline silica overview : occurrence and analysis (Washington, D.C. : United States, Department of the Interior, Bureau of Mines, 1992., 1992), also by Sarkis G. Ampian and United States Bureau of Mines (page images at HathiTrust)
• Virta, Robert L.: The phase relationship of talc and amphiboles in a fibrous talc sample (U.S. Dept. of the Interior, Bureau of Mines, 1985) (page images at HathiTrust)
• Virta, Robert L.: Relationship of mineral habit to size characteristics for tremolite cleavage fragments and fibers (Dept. of Interior, Bureau of Mines, 1979), also by Michael H. Eisner, Eric B. Steel, and William Joseph Campbell (page images at HathiTrust)
• Virta, Robert L.: Size and shape characterization of fibrous zeolites by electron microscopy (U.S. Dept. of the Interior, Bureau of Mines, 1982), also by Kim B. Shedd and Ann G. Wylie (page images at HathiTrust)
• Virta, Robert L.: The talc industry--an overview (U.S. Dept. of the Interior, Bureau of Mines, 1989) (page images at HathiTrust)
• Virta, Robert L.: The talc industry--an overview (U.S. Dept. of the Interior, Bureau of Mines, 1989) (page images at HathiTrust)

Find more by Robert L. Virta at your library, or elsewhere.