QJ 1669-1989
Implementation Rules for Adjustment of Classification of Scientific and Technological Documents (English Version)
- Standard No.
- QJ 1669-1989
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aerospace
- Status
- Latest
- QJ 1669-1989
QJ 1669-1989 history
- 1970 QJ 1669-1989 Implementation Rules for Adjustment of Classification of Scientific and Technological Documents
