The Online Books Page

Books by Ralph L. Hopkins:

Books in the extended shelves:

• Hopkins, Ralph L.: Extraction of sulfides from petroleum fractions by conversion to sulfonium salts (U.S. Dept. of the Interior, Bureau of Mines, 1964), also by H. T. Rall, C. J. Thompson, and H. J. Coleman (page images at HathiTrust)
• Hopkins, Ralph L.: Presence of thienothiophenes in Wasson, Texas, crude oil (U.S. Dept. of the Interior, Bureau of Mines, 1966), also by H. T. Rall, H. J. Coleman, C. J. Thompson, American Petroleum Institute. Research Project 48, and United States Bureau of Mines (page images at HathiTrust)
• Hopkins, Ralph L.: Synthesis of alkyl cycloalkyl and dicycloalkyl sulfides (U.S. Dept. of the Interior, Bureau of Mines, 1966), also by H. T. Rall, C. J. Thompson, H. J. Coleman, R. W. Higgins, American Petroleum Institute. Research Project 48, and United States Bureau of Mines (page images at HathiTrust)
• Hopkins, Ralph L.: Synthesis of cyclic sulfides (U.S. Dept. of the Interior, Bureau of Mines, 1967), also by H. T. Rall, C. J. Thompson, H. J. Coleman, R. W. Higgins, and American Petroleum Institute (page images at HathiTrust)

Find more by Ralph L. Hopkins at your library, or elsewhere.