. . . . . . . "Alois Francis Kovarik papers"@en . . . . . . . . . . . . . . . "Physicist, professor at Yale University. Correspondence, writings, lecture notes and glass slides relating to Kovarik's work on radioactive materials."@en . . . . . . . . . . . . . . . . . . . . . . . . "Yale University. Department of Physics." . . "National Research Council (U.S.). Committee on the Measurement of Geological Time." . . . . "National Research Council (U.S.). Committee oon Standards of Radioactivity." . .