| Characteristic | Trade | Prof | College | K-12 | News/Mag | Corporate |
|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
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Source
Release date
September 2012
Region
United States
Survey time period
April 2012
Special properties
publishers
Supplementary notes
The number of respondents was not disclosed.
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