TY - BOOK ED - NATO Advanced Study Institute on Mathematical Physics, 2d, Istanbul, 1972. ED - Barut, A. O. (Asim Orhan), 1926- TI - Group theory in non-linear problems SN - 9027704120 PY - 1974/// CY - Dordrecht PB - D. Reidel Publishing Company KW - Nonlinear theories KW - Group theory N1 - Lectures presented at the NATO Advanced Study Institute on Mathematical Physics, held in Istanbul, Turkey, August 7-18, 1972 ER -