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| 2671499 | Reavis et al. | Mar 1954 | A |
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| 2921625 | Krasnov et al. | Jan 1960 | A |
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| 3195950 | Mednick | Jul 1965 | A |
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| Entry |
|---|
| The Soft Furnishing Book, p. 63, 1994. |
| Concepts by Heather Luke, (1 Pg.), 1997. |
| Conran Octopus Limited, p. 125, 1986. |