World Guide to Covered Bridges

The World Guide to Covered Bridges (WGCB) is a covered bridge numbering system. The system was invented by John Diehl, the chairman of the Ohio Covered Bridge Committee. The committee first used the numbering system in 1953 to publish a list of covered bridges in Ohio.^[1]

References

1. ^ Dr. James E. Reinoehl (1998-05-19). "The Covered Bridge Numbering System". Ohio Covered Bridge Homepage. Archived from the original on 2005-04-07. http://web.archive.org/web/20050407090444/http://members.aol.com/jreinhl/maps/numbers.htm. Retrieved 2009-09-15.