1. Nolan P. J.:The photo electric counter and its application for measuring diffusion coefficients. Proc. of the Conference on atmospheric electricity, May 1954, pp. 113–119, G. R. paper 42, U.S. Air Force (1955).
2. Nolan P. J.:The equilibrium of ionization in the atmosphere and nuclear combination coefficients. J. At. Terr. Physics, London, 9, 295–303, (1956).
3. Keefe D., Nolan P. J. &Rich T. A.:Charge equilibrium in aerosols according to the Boltzmann law. Proc. Royal Irish Acad., Dublin, 60A, 27–45, (1959).
4. Nolan P. J. &Kennan E. L.:Condensation nuclei from hot platinium: size, coagulation coefficient and charge-distribution.Ibidem 52A, 171–190, (1949).
5. O'Connor T. C.:Some characteristics of condensation nuclei stored in a large vessel. Geofisica pura e applicata, Milano, 31, 107–114, (1955).