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Start Over You searched for: Media Type black-and-white negatives Remove constraint Media Type: black-and-white negatives Subject Buildings Remove constraint Subject: Buildings Subject Construction projects Remove constraint Subject: Construction projects Institution National Park Service Remove constraint Institution: National Park Service

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21. Construction of roof

22. Construction of house

25. Construction of building

26. Construction if masonry

27. Constructing house

28. Building under construction

29. Building under construction

30. Building under construction