Online Books by
Daniel Welch
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Welch, Daniel: Perceptual factors and meanings of symbolic information elements (The Offices, 1977), also by Ernest W. Lareau, King M. Roberts, and United States. Federal Highway Administration. Offices of Research and Development (page images at HathiTrust)- Welch, Daniel: Perceptual factors and meanings of symbolic information elements (Dept. of Transportation, Federal Highway Administration, Offices of Research and Development ;, 1977), also by King M. Roberts, Ernest W. Lareau, and United States Federal Highway Administration (page images at HathiTrust)
- Welch, Daniel: Perceptual factors and meanings of symbolic information elements. Volume I, executive summary. (1977), also by King M. Roberts and Ernest W. Lareau (page images at HathiTrust)
- Welch, Daniel: Perceptual factors and meanings of symbolic information elements. Volume II, technical report. (1977), also by King M. Roberts and Ernest W. Lareau (page images at HathiTrust)
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