Number | Name | Date | Kind |
---|---|---|---|
3079835 | Saperstein | Mar 1973 | |
3277304 | Vyce | Oct 1966 | |
3574466 | Peters | Apr 1971 | |
3804522 | Smith | Apr 1974 |
Number | Date | Country |
---|---|---|
1,063,873 | Mar 1967 | UK |
Entry |
---|
Hazell et al., Jour. Sci. Instr., Series 2, Vol. 2, 1969, pp. 110-111. |