Making a clock- accurate sundial

Eitemau Tebyg

• Biological clocks
  gan: Manorama, Jafa
  Cyhoeddwyd: (1979)
• The quantum beat : the physical principles of atomic clocks
  gan: Major, F. G.
  Cyhoeddwyd: (1998)
• Clock of Ages: Why We Age-How We Age-Winding Back the Clock
  gan: Medina, John. J
  Cyhoeddwyd: (1996)
• Five Clocks, with and Introduction
  gan: Joos, Martin
  Cyhoeddwyd: (1967)
• Biological clock: two views
  gan: BrownJr, Frank A
  Cyhoeddwyd: (1970)