United States /

Eitemau Tebyg

• The united states
  gan: Steen, Ralph W.
• The United States /
  gan: Donovan, Patric O
  Cyhoeddwyd: (1968)
• United states
• The United States /
  gan: Ralph Valney Harlow
• The united states
  gan: Hofstadter, Richard, et al.
  Cyhoeddwyd: (1972)