U.S. Government specification for coal-tar saturated rag felt for roofing and waterproofing.

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Bibliographic Details
Online Access: Full Text (via ProQuest)
Format: Government Document eBook
Language:English
Published: [Washington?] : U.S. G.P.O., 1924.
Series:Fed. Specs. Bd. Spec. No. 81.
Standards Bur. Circ. No. 156.
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Call Number: C13.4-156
C13.4-156 Available