Number | Name | Date | Kind |
---|---|---|---|
1724747 | Cochius | Aug 1929 | |
2229770 | Ramseyer | Jan 1941 | |
R26328 | Monks | Jan 1968 |
Number | Date | Country |
---|---|---|
289,064 | Nov 1971 | SU |
Entry |
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Weyl, W. A., Coloured Glasses - Dawson's Of Pall Mall, London, (1959), pp. 106-109, 254-256. |
Shand - Glass Engineering Handbook - McGraw-Hill, N.Y., (1958), p. 4. |