1. Letter from Linus Pauling to William B. Castle Creator: Pauling, Linus, 1901-1994 Date: 28 May 1963 Genre: Letters (correspondence)
2. Letter from Linus Pauling to Arthur Hawley Parmalee Creator: Pauling, Linus, 1901-1994 Date: 20 May 1949 Genre: Letters (correspondence)