The first twenty five years of the patent cooperation treaty, 1970 - 1995

Eitemau Tebyg

• Patent cooperation treaty handbook
  Cyhoeddwyd: (1998)
• Patent cooperation treaty, 1970 and regulations under the PCT,1996
  Cyhoeddwyd: (1997)
• Records of the Washington diplomatic conference on the patent cooperation treaty, 1970
  Cyhoeddwyd: (1972)
• UN : the first twenty -five years
  gan: Eichelberger, Clark M.
  Cyhoeddwyd: (1970)
• United Nations : The first twenty five years
  gan: Tetlow Edwin
  Cyhoeddwyd: (1970)