Number | Name | Date | Kind |
---|---|---|---|
1563551 | Bulask | Dec 1925 | |
3429042 | Lawrence et al. | Feb 1969 | |
3593635 | Servetnick | Jul 1971 | |
4152739 | De Moss et al. | May 1979 |
Number | Date | Country |
---|---|---|
404515 | Jan 1934 | GBX |
Entry |
---|
Research Disclosure, vol. 172, Pul. No. 17299, p. 38, Pul. No. 17297, p. 82, Aug. 1978. _ _ |