Number | Date | Country | Kind |
---|---|---|---|
761097 | May 1976 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
D173811 | Marholz | Jan 1955 | |
D205728 | Boldt | Sep 1966 | |
D230026 | Sims | Jan 1974 |
Entry |
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Lapine Scientific Co. Cat., "Models for Mathematics & Technical Education/1966," .COPYRGT.'65, p. D, Group Z-9658, Art Set 1, 2nd from bottom photo on p. D, 3rd from right item, Trapezoid Within Rectangular, (6-Sided), Solid. |