by Turin, G.L., Clapp, F.D., Johnston, T.L., Fine, S.B., Lavry, D.
Published in IEEE transactions on vehicular technology (01.02.1972)

by Linlor, W.I, Clapp, F.D, Meier, M.F, Smith, J.L
Published in U S For Serv Reprints of articles by FS employees (1975)

by Clapp, F.D.
Published in Proceedings of the IRE (01.08.1949)