[Spiral stairs : plan at deck, elevations, and plan at grade] / Duvinage Spiral Stair Co. was from Hagerstown, MD.

Using These Materials

Info for Visitors

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Ordering Reproductions

RESTRICTIONS:

The original collections at the Avery and the Bentley are open for research.

USE & PERMISSIONS:

Copyright is retained by the Muschenheim family. Patrons are responsible for determining the appropriate use or reuse of materials.