O-PORT-UNIDADE - Das Port Projekt
Vintageport.se - The swedish Port Site
The Portwine-Brotherhood Confraria do Vinho do Porto
Schott-Zwiesel - Glas in Perfection
Selters - Perfect Wine-Company
Wine in Moderation - Be responsible
Military Map of the Douro Valley (1:50.000)
The Port-forum - The Chat on Port