Two pamphlets from General Railway Signal Company. (1) Centralized Traffic Control, Type K, Class M, Handbook 28. 1944. 54pp. Stiff wrappers. FINE copy. (2) GRS Car Retarder System, Maintenance Instructions, 1949. Handbook 35. 7"x 5", 90pp, illustrated, several folding plates. Metal spine binding. Stiff wrappers. FINE copy. Both are quite lovely, and fresh. Provenance for both: Library of Congress, with their rubber stamp on the last page of the pamphlet. Scarce.

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Bibliographic Details

Title

"Centralized Traffic Control, Type K, Class M, Handbook 28" WITH "GRS Car Retarder System, Maintenance Instructions, Handbook 35"--2 scarce items

Publisher

General Railway Signal Company, Rochester, NY

Publication Date

1944

Binding

Soft cover

Condition

Fine

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We have been in business since 1985--including a store in Georgetown, D.C. from 1985-2002--specializing in significant and hard-to-find works in modern (say, after 1850) physics, math, astronomy, and technology.

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JF Ptak Science Books
NC, U.S.A.

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