World patent information : Bechtel H., Zoeke I., Marhan H. and Kleinschmager H. online patent searching - useful but still in its infancy 7(1/2), 68–82

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 108 KB
• Volume: 7
• Category: Article
• ISSN: 0172-2190
• DOI: 10.1016/0172-2190(85)90088-2