1972 Britannica yearbooks of science and the future

Eitemau Tebyg

• 2000 Britannica book of the year
  Cyhoeddwyd: (2000)
• 1972 Britannica yearbook of science and the future
  gan: Schoelkopf, Dean H
  Cyhoeddwyd: (1971)
• BRITANNICA YEARBOOK OF SCIENCE AND THE FUTURE
  Cyhoeddwyd: (1972)
• BRITANNICA YEARBOOK OF SCIENCE AND THE FUTURE
  Cyhoeddwyd: (1973)
• BRITANNICA YEARBOOK OF SCIENCE AND THE FUTURE
  Cyhoeddwyd: (1974)