found: University of Minnesota news online, July 27, 2013(article from July 17, 2003: Tibor Zoltai; former professor of geology at the University of Minnesota, retired 1991; died July 13, 2003 at his home in St. Paul from congestive heart failure; born in Hungary; WWII refugee who immigrated to Canada as an agricultural laborer over 50 years ago; received bachelor's degree in applied geology from University of Toronto in 1955 and doctorate in mineralogy and crystallography in 1959 from Massachusetts Institute of Technology; joined University of Minnesota geology faculty in 1959, specializing in the study of the crystal structure of minerals; served as department head from 1963 to 1971; in 1984 he published the textbook Mineralogy : Concepts and Principles, with fellow University of Minnesota geology professor James Stout)