United States government master specification for colon tube.
Series: Circular of the Bureau of Standards -- no. 221; Federal Specifications Board specification -- no. 236
Publisher: Govt. Print. Off.
Published: 1925
Place of publication: [Washington
Language: eng
Subjects: Tubes.; Rubber.
Other titles: Colon tube.
Notes: "Issued May 22, 1925."

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