World Guide to Covered Bridges

The World Guide to Covered Bridges is published by the National Society for the Preservation of Covered Bridges (NSPCB).^[1] It uses a covered bridge numbering system developed 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.^[2]

The National Society for the Preservation of Covered Bridges has produced eight editions of this book. The first edition was titled Guide to Covered Bridges of the United States. Later editions have all been titled World Guide to Covered Bridges.

World Guide editions

Edition	Issue year	Editor(s)
1	1956	Betsy and Philip Clough
2	1959	Betsy and Philip Clough
3	1965	Harold F. Eastman
4	1972	Oscar F. Lane
5	1980	Richard T. Donovan
6	1989	Bill Heisel
7	2009	David W. Wright
8	2021	William S. Caswell, Jr.

Updates to the 2021 edition are available as a PDF file.^[3]