Stereochemistry and reactivity of systems containing [Greek letter pi] electrons : proceedings of the symposium "Stereochemistry and reactivity in pi systems" held May 19-22, 1982 in recognition of Professor Paul Bartlett's many years of leadership in physical organic chemistry - Watson, William H., 1931-; Bartlett, Paul D., 1907-1997 (Methods in stereochemical analysis ;, 1983)