Home › Authors › P. H. Doolittle 👤 P. H. Doolittle 3 books Books by P. H. Doolittle Dissociative photoionization o Dissociative photoionization of O₂ 1968 Energetic positive ions from p Energetic positive ions from photoionization of gases 1967 Electron retarding potential s Electron retarding potential studies of photoionization 1965