1. C. N. Archie, T. A. Alvesalo, J. D. Reppy, and R. C. Richardson,J. Low Temp. Phys. 42, 295 (1981).
2. J. Saunders, E. K. Zeise, A. I. Ahonen, C. N. Archie, D. G. Wildes, Y. A. Ono, and R. C. Richardson,J. Low Temp. Phys., to be submitted.
3. G. Eska, K. Neumaier, W. Schoepe, K. Uhlig, W. Wiedemann, and P. W�lfle,Phys. Rev. Lett. 44, 1337, 1712(E) (1980);Physica 108B, 1153 (1981).
4. T. Kodama and H. Kojima, Rutgers University preprint, RU-81-030.
5. D. C. Carless, P. W. Alexander, H. E. Hall, J. R. Hook, and N. V. Wellard,Physica 108B, 793 (1981), and to be published.