British standard guide for graphical symbols for electrical power, telecommunications and electronicdiagrams.
Edition: 1st revision.
Series: BS 3939 -- Part 2 : 1985; BS 3939 -- Part 2.
Publisher: B.S.I.
Published: 1985
Place of publication: London
Language: eng
Number of pages: 32
Notes: Text on inside front cover.

Previously published as separate sections of BS 3939 from 1966.

Cover title.