Introduction - Paper Prototyping: The Fast and Easy Way to Define and Refine User Interfaces - page 21

Companion Web Site: www.paperprototyping.com
There's a companion Web site for this topic at www.paperprototyping.com . There you'll find
downloadable versions of materials shown in this topic, including worksheets, handouts, and forms.
The site also contains links to places where you can purchase the supplies used in paper prototyping
and links to papers and articles available online. The symbol in the margin is used throughout this topic
to indicate the presence of corresponding materials on the Web site.