1. Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound system
2. M. Onellion, Y. Chang, D.W. Niles, Robert Joynt, G. Margaritondo, N.G. Stoffel and J.M. Tarascon, unpublished.
3. F.C. Brown, T.-C. Chiang, T.A. Friedmann, D.M. Ginsberg, G.N. Kwawer and T. Miller, unpublished.
4. A. Fujimori, E. Takayama-Muromachi, Y. Uchida and B. Okai, unpublished.
5. P.D. Johnson, private communication.