File:Sanfranciscobluesposter.jpg

Summary
2002 thumbnail of the official poster for the 30th Annual San Francisco Blues Festival.

Source: http://sfblues.com/merchandise/product_photo.php3

Fair use:

The image is used as the primary means of visual identification of the article topic.

It is a low resolution copy of the festival poster;

It does not limit the copyright owners rights to sell the poster in any way; and

The use of the image is very important and adds significantly to the article about San Francisco Blues Festival