United States government specification for coal-tar saturated rag felt for roofing and waterproofing.
Contributors: United States. Bureau of Standards.
Series: Circular of the Bureau of Standards -- no. 156; Federal Specifications Board standard specification -- no. 81
Publisher: Govt. Print. Off.
Published: 1924
Place of publication: [Washington
Language: eng
Subjects: Felt.; Roofing.; Waterproofing.
Other titles: Specification for coal-tar felt
Notes: "March 1, 1924."

At head of title: Department of Commerce. Bureau of Standards.