The international (SI) metric system and how it works
Subtitle: new (SI) units and changes included
By: [by] Robert A. Hopkins.
Edition: 2d ed., rev.
Publisher: Polymetric Services
Published: 1974
Place of publication: Tarzana, Calif
Language: eng
Number of pages: 287
Subjects: Metric system.; Weights and measures -- United States.
Notes: Includes bibliographical references.