Number | Date | Country | Kind |
---|---|---|---|
2718735 | Apr 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3590307 | Dobrusskin et al. | Jun 1971 |
Number | Date | Country |
---|---|---|
1290189 | Sep 1972 | GBX |
Entry |
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Reiling, "Journal of the Optical Society of America", (1964), vol. 54, No. 4, pp. 532-540. |