Linear and nonlinear electron transport in solids : [lectures presented at the NATO Advanced Study Institute on Linear and Nonlinear Electronic Transport in Solids held at the State University of Antwerp (RUCA), Antwerp, Belgium, July 21-August 2, 1975] - Devreese, J. T. (Jozef T.); Van Doren, Victor E. (Plenum Press, 1976)