Various total cross-sections for electron impact on C2H2, C2H4 and CH3X (X = CH3, OH, F, NH2) K. N. Joshipura and M. Vinodkumar Eur. Phys. J. D, 5 2 (1999) 229-235 Published online: 15 February 1999 DOI: 10.1007/s100530050250