International patent classification (IPC) Union: Committee of expert, nineteenth session, February 25 to March 1 1991, Geneva

• Book ID: 107926751
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 51 KB
• Volume: 13
• Category: Article
• ISSN: 0172-2190
• DOI: 10.1016/0172-2190(91)90015-w