>From [log in to unmask] Tue Jul 12 13:11:05 1994
>An interesting reference you may want to look into for wonderful articles
>about bridges, bridge building, old photos, etc. is Invention and Technology
>Magazine, published (or at least the sole advertiser) by General Motors.
>Over the years, they have had many fine articles about bridges.  Finding them
>and then contacting the authors would undoubtedly give you a great deal of
>information.
 
It does seem the only advertiser is General Motors, but the magazine is
"American Heritage of Invention & Technology" published by Forbes, Inc.
It's $15.00 for one year (four issues) and the address for subscriptions
is P.O. Box 52607, Boulder, CO  80321-2607 or phone 1-800-627-4022.
(I have no connection with the magazine except I've just learned about
it and subscribed and I think it's wonderful.)