The international system of units
Subtitle: physical constants and conversion factors
By: [by] E. A. Mechtly.
Edition: 2d revision.
Series: NASA SP; -7012; NASA SP ;; 7012.
Publisher: Scientific and Technical Information Off., National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1973
Place of publication: Washington
Language: eng
Number of pages: 21
Subjects: Metric system.
Notes: Bibliography: p. 21.