Dr Bray and co-workers comment

Eitemau Tebyg

• Dr Sibert and co-workers comment
  gan: Sibert, J R, et al.
  Cyhoeddwyd: (1980)
• Dr Evans and co-workers comment
  gan: Evans, J. M., et al.
  Cyhoeddwyd: (1978)
• Dr. Romagnoli and co-workers comment
  gan: Segni, G., et al.
  Cyhoeddwyd: (1978)
• Dr Naveh and co-workers comment
  gan: Naveh, Y., et al.
  Cyhoeddwyd: (1978)
• Dr Beverley and co-workers comment
  gan: Beverley, D. W., et al.
  Cyhoeddwyd: (1979)