1800s Archive · Machinery & technology

Library of Congress, Washington, D.C.] [Heating and Ventilation.] [Operating gear for skylight registers of bookstacks.] [Details, plans, and sections.

Washington, D.C. · 1893

Library of Congress, Washington, D.C.] [Heating and Ventilation.] [Operating gear for skylight registers of bookstacks.] [Details, plans, and sections., Washington, D.C., 1893
Library of Congress, Washington, D.C.] [Heating and Ventilation.] [Operating gear for skylight registers of bookstacks.] [Details, plans, and sections., Washington, D.C., 1893. Machinery & technology — The 1800s Archive, from the Library of Congress record.

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