Role of hospitality certificates in the

Eitemau Tebyg

• Handbook of seed certification
  gan: Devendra kumar, mishra
  Cyhoeddwyd: (2012)
• Selection and Certification in Education and Employment
  gan: Organisation for Economic Co-Operation and Development
  Cyhoeddwyd: (1977)
• Ecotourism & certification : setting standards in practice
  gan: Honey, Martha, Ed
  Cyhoeddwyd: (2002)
• HANDBOOK OF SEED Certification
  Cyhoeddwyd: (2013)
• Indian minimum seed certification standards
  gan: Tunwar N S, Singh S V
  Cyhoeddwyd: (1988)