The Tragedy of human effort.

Eitemau Tebyg

• Recovery, the second effort.
  gan: Salter, Arthur Salter, Baron, 1881-
  Cyhoeddwyd: (1932)
• Effort : economy of human movement
  gan: Laban, Rudolf, 1879-1958
  Cyhoeddwyd: (1974)
• Plutology, or, the Theory of the efforts to satisfy human wants /
  gan: Hearn, William Edward, 1826-1888
  Cyhoeddwyd: (1864)
• Political control of the economy /
  gan: Tufte, Edward R., 1942-
  Cyhoeddwyd: (1978)
• Public policy : the competitive framework /
  gan: Michael, Ewen James
  Cyhoeddwyd: (2006)