Drucker, Peter F, 1909-20052014-03-312014-03-311940-10-03http://hdl.handle.net/11209/5450Letter from Peter Drucker to President Robert Devore Leigh regarding Drucker's upcoming lecture on November 28, 1940.en-USPolanyi, Karl, 1886-1964Drucker, Peter, 1909-2005Leigh, Robert Devore