BS 1000 [65/651+657/659] : 1968 : UDC : industrial and business management and organization. communication
- 4th International ed
- London BSI 1698
- 39p.
- FID pub. ; No. 179 .
BS 1000 [65/651+657/659] : 196
025.45:[65,651+657/659] /
BS 1000 [65/651+657/659] : 196
025.45:[65,651+657/659] /