Dietrich Gruen (1847-1911)

References

Selected Bibliography

Fuller, Eugene T. "The Priceless Possession of A Few." Bulletin Supplement of the National Association of Watch and Clock Collectors 10 (1974).

Gruen, Frederick G. "Historical Facts about the Development of Gruen Watchmakers Guild." In Buckeye Horology. Edited by James W. Gibbs, 83-91. Columbia, PA: The Art Crafters, 1971.

Gruen, Robert Dietrich. A Brief History of the Gruen Watch Company. Indianapolis: KenRo Printing Company, 1991.

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