Number | Name | Date | Kind |
---|---|---|---|
2149779 | Kroner | Mar 1939 | |
2220527 | Kroner | Nov 1940 | |
2294465 | Lasker | Sep 1942 | |
2670961 | Winters | Mar 1954 |
Entry |
---|
"The Inside Story" Simmons, July 1947. |
The World Book Encyclopedia, 1974, vol. 9, pp. 378-379. |
Structure, 1941, General Electric Company. |