Update standards

Eitemau Tebyg

• Standards : recipes for reality /
  gan: 393114 Busch, Lawrence
  Cyhoeddwyd: (2013)
• A standard for standards
  gan: 8096 British Standards Institution
• Business standards : the magazine of the British Standards Institution
  Cyhoeddwyd: (1996)
• ANSI standards action / American National Standards Institute
  gan: American National Standards Institute
  Cyhoeddwyd: (1970)
• Canadian Standards Association Focus/Canadian Standards Association
  Cyhoeddwyd: (1986)