Twenty pest plays of the modern American theatre. /

Eitemau Tebyg

• Twenty-five best plays of the modern American theatre. Early series. /
  gan: Gassner, John
  Cyhoeddwyd: (1949)
• Best plays of the American theatre. Series 2. /
  gan: Gassner, John
  Cyhoeddwyd: (1950)
• Theatre at the crossroads Plays and playwrights of the mid-century American stage /
  gan: Gassner, John
  Cyhoeddwyd: (1966)
• Best american plays. series 3-5. /
  gan: Gassner, John
  Cyhoeddwyd: (1952)
• Form and Idea in Modern Theatre
  gan: Gassner, John
  Cyhoeddwyd: (1956)