On the determination of the trilinear boson couplings in e+e- --> l$\overline{\nu}_{l}$ q$\overline{q}$' at LEPII

We present the full tree-order calculation of the process e^+e^-\to\ell\bar{\nu}_\ell\; q \bqp including the width effects in a way which is consistent with gauge invariance and high energy unitarity and which has a natural interpretation within standard perturbation theory. We also include C- and P-preserving deviations from Standard Model trilinear vector boson couplings. An analysis of the sensitivity of these channels on the trilinear couplings, using well measured angular variables of the four fermion final state, is also presented.