Standard samples
Subtitle: general information.
Contributors: United States. Bureau of Standards.
Edition: 6th ed.
Series: Circular of the Bureau of Standards -- no. 25
Publisher: Government Printing Office
Published: 1917
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Chemistry, Analytic -- Standards.
Notes: "Issued June 20, 1917."

At head of title: Department of Commerce.

This circular supersedes former editions numbered 1 to 5 under title "Standard analyzed samples : general information."

Includes a supplement (January 15, 1931) at end.