✦ LIBER ✦
Improved acoustic device: Krupp, F., French patent 1, 575, 423 (18 July 1969) (applied for 8 August 1968) (1889)
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 131 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0041-624X
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