The Complete Guide to Selection, Design, & Construction of Model Railroad Bridges. The author, Paul Mallery, is a master model railroader. Superb, easy to read text. Become an expert bridge engineer in one reading.

From Kalmbach Books.
Teaches how to build sturdy model bridges and trestles of stunning realism.
Includes construction plans, prototype photos, and over 20 sets of scale drawings for scratchbuilding, kitbashing, or modifying commercial bridge kits. Perfect-bound softcover; 8 1/4 x 11 1/4; 152 pages; 100 b&w photos; 100 illustrations;