Modern century illustrated encyclopaedia, Vol.9: Mass productions to Nervous system

Eitemau Tebyg

• Modern century illustrated encyclopaedia, Vol.8: Kentucky to Mass
  Cyhoeddwyd: (1972)
• Modern century illustrated encyclopaedia, Vol.3: Bread to Chrysalis
  Cyhoeddwyd: (1972)
• Modern century illustrated encyclopaedia, Vol.4: Church to Desert
  Cyhoeddwyd: (1972)
• Modern century illustrated encyclopaedia, Vol.1: A to Astronomy
  Cyhoeddwyd: (1972)
• Modern century illustrated encyclopaedia, Vol.2: Athens to Brazil
  Cyhoeddwyd: (1972)