A SIMPLIFIED ALL-PURPOSE GRAVITY WRITING LEVER

✍ Scribed by HULPIEU, H. R.

• Book ID: 121137708
• Publisher: American Association for the Advancement of Science
• Year: 1943
• Tongue: English
• Weight: 200 KB
• Volume: 98
• Category: Article
• ISSN: 0036-8075
• DOI: 10.1126/science.98.2535.116