Online Books by
Michael J. Effenberger
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Effenberger, Michael J.: Crash tests of small highway sign supports. (Federal Highway Administration Offices of Research & Development Implementation Division, 1980), also by Kenneth C. Walker, Hayes E. Ross, United States. Federal Highway Administration. Implementation Division, and Texas Transportation Institute (page images at HathiTrust)- Effenberger, Michael J.: Crash tests of small highway sign supports (Dept. of Transportation, Federal Highway Administration, [Office of Development], Implementation Division ;, 1980), also by Hayes E. Ross, Kenneth Charles Walker, and United States. Federal Highway Administration. Implementation Division (page images at HathiTrust)
- Effenberger, Michael J.: Crash tests of small highway sign supports. Interim report. (1978), also by Hayes E. Ross and K. C. Walker (page images at HathiTrust)
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