1. these Proceedings 10th Int. Free Electron Laser Conf.;Takeda,1989
2. S.J. Gitomer, H. Takeda, B.D. McVey and J.C. Goldstein, presented at this Conference.
3. these Proceedings 10th Int. Free Electron Laser Conf.;Sollid,1989
4. these Proceedings 10th Int. Free Electron Laser Conf.;Feldman,1989
5. these Proceedings 10th Int. Free Electron Laser Conf.;Warren,1989