In the 1960s and 1970s his research alone and with students focused in journal publications and conference papers on models of high energy processes, radiative and resolution corrections for resonances in electron–positron annihilation, spin-flip synchrotron radiation and the polarization of electrons in a storage ring, and, after November 1974, the spectroscopy of the charm–anticharm particles. In 1973, he lectured again at the Scottish Universities Summer School, on hadronic interactions at high energies, and in 1976 at the SLAC Summer Institute, on charmonium spectroscopy. In 1973–74 he ran the nascent theory group at Fermilab and co-edited the proceedings of the 1973 "Rochester" Conference.