Probing Quartic Couplings Through Three Gauge Boson Production at an   $e^+e^-$ Linear Collider
  We explore the capability of a 500 or 1000 GeV $e^+e^-$ linear collider to measure anomalous quartic gauge boson couplings. In the framework of a non-linear effective Lagrangian with a custodial $SU)2)$ symmetry, there are only two next-to-leading order operators which contribute to quartic, but not to two- and three- gauge boson interactions. The limits on the coefficients of these operators from present and future $e^+e^-$ colliders are compared with those available from other sources. 
S. Dawson (BNL), A. Likhoded (IITAP), G. Valencia (ISU), and O.   Yushchenko (IHEP)