Research and industry, 1975-76, Vol.20-21, No.01-04

Eitemau Tebyg

• Research and industry, 1973, Vol.18, No.01-04
  Cyhoeddwyd: (1973)
• Research and industry, 1974, Vol.19, No.01-04
  Cyhoeddwyd: (1974)
• Research and industry, 1977, Vol.22-24, No.01-04
  Cyhoeddwyd: (1977)
• Journal of scientific and industrial research, 1975, Vol.34, No.01-12
  Cyhoeddwyd: (1975)
• Research and development in industry 2000-01 /
  Cyhoeddwyd: (2003)