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Microfilm aperture card system

 Subject
Subject Source: Library of Congress Subject Headings

Found in 1 Collection or Record:

Permit plans

 Series
Identifier: 5410.004
Scope and Contents Plans filed with building permits in paper form from circa 1902-1970 and on aperture cards from circa 1970-1995. Contact the Inspectional Services Department, Building Division for access to plans on aperture cards.
Dates: circa 1902-1995