"Pfaff, Richard William" . "Pfaff" . . "Richard W." . "Pfaff, Richard W. (1936-)" . "1936"^^ . . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . "Richard W. Pfaff" . "Pfaff, R.W." . . . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b "2023-05-21"^^ . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b "068982739" . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b . _:Bcd53340dfa425a42bc6dd2bad56e5d6b .