https://digital.sciencehistory.org/works/uitxfqq Letter from Otto Haas to John C. Haas, May 21, 1939 http://rightsstatements.org/vocab/InC/1.0/ Haas, Otto, 1872-1960 Haas, John C. (John Charles) 1939-May-21 Letter from Otto Haas (1872-1960) to his son John C. Haas (1918-2011). Otto Haas founded Rohm & Haas in 1909. John C. Haas started working at Rohm & Haas in 1942. After his father's death in 1960, Haas became executive vice president, and his brother F. Otto Haas became president and chief executive officer. He continued to work as chairman, and then on the board, until 1988. The Otto Haas Family Papers Pennsylvania--Villanova English David Haas Haas, John C. (John Charles) Haas, Otto, 1872-1960 text personal correspondence https://digital.sciencehistory.org/downloads/deriv/nseod2e/thumb_large_2X?disposition=inline https://digital.sciencehistory.org/works/uitxfqq http://rightsstatements.org/vocab/InC/1.0/ personal correspondence https://digital.sciencehistory.org/downloads/deriv/nseod2e/download_full?disposition=inline https://digital.sciencehistory.org/downloads/deriv/xi2lr9t/download_full?disposition=inline https://digital.sciencehistory.org/downloads/deriv/j2tfa3j/download_full?disposition=inline