City of Athens Public Works Department
Peter W. Hawkes
Roy Treloar
Hans Klein Woud
Andrzej J. Osiadacz
Ahmed F. El-Sayed
ASME
United States. General Accounting Office
Unknown Author
Jack D. Mattingly
American Society of Mechanical Engineers Staff
Arthur L. Kohl
D. E. Winterbone
Ralph D. Bent
John Doerr
William D. McCain
Arnold, Ken
Alex C. Hoffmann
Gilberto Enríquez Harper