I recommend following websites:

• The Metropolitan Museum of Art, New York
• The Textile Museum, Washington DC
• Academy of Fine Art, Warsaw, Poland
• American Textile History Museum
• Regional Alliance for Preservation
• Canadian Association for Conservation
• United Kingdom Institute for Conservation / Textile Section
• International Centre for the Study of the Preservation and Restoration of Cultural Property
• The American Institute for Conservation of Historical and Artistic Works (AIC)