Copyright Terms, Permissions, and Liability Limits
The materials found on this web site are the copyrighted property of the Commonwealth of Virginia, and are provided for informational purposes only. You may copy these materials for your personal, noncommercial use only, provided that all copies that you make bear the following copyright statement:

No other use is permitted without the express written permission of the VTRC Director. Except as authorized in this paragraph, you are not being granted a license under any copyright, trademark, patent, or other intellectual property right in the material found or described herein. All such rights are retained by the Commonwealth of Virginia. You may not create framed links to VTRC web pages without express written permission from the VTRC Director. VTRC gives no warranty for these materials, and assumes no liability of any kind for any consequences arising from their use in any way. This includes, but is not limited to, any damage to a computer caused by downloading or using the materials, and any damages caused by applying the content of the materials in any fashion.

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What's is the expected use of the material, and the material requested for use? Please be specific, giving publication names or website addresses. Describe images, or use their figure numbers. If you don't specify what you intend to use, we cannot grant permission.