The international system of units
Subtitle: physical constants and conversion factors
By: [by] E.A. Mechtly.
Series: NASA SP-; 7012
Publisher: Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.]
Published: 1964
Place of publication: Washington
Language: eng
Number of pages: 20
Subjects: Metric system.
Notes: Bibliography: p. 20.