Number | Name | Date | Kind |
---|---|---|---|
1362069 | Witzel | Dec 1920 | |
2156859 | Lowe | May 1939 | |
2905283 | Leach | Sep 1959 | |
2916235 | Nager | Dec 1959 | |
2963310 | Abolins | Dec 1960 | |
3284966 | Bolt | Nov 1966 | |
3312019 | Faerber | Apr 1967 | |
3372521 | Thom | Mar 1968 | |
3423896 | Widerby | Jan 1969 | |
3492767 | Pincus | Feb 1970 | |
3564786 | Baker | Feb 1971 | |
3722152 | Schlatter | Mar 1973 | |
3752511 | Racy | Aug 1973 | |
3792558 | Berce | Feb 1975 | |
3818654 | Schramm | Jun 1974 | |
3972439 | DiMartino | Aug 1976 | |
3992828 | Ohe | Nov 1976 | |
4006574 | Van Der Lely | Feb 1977 | |
4120133 | Rodgers | Oct 1978 | |
4212251 | DiMartino | Jul 1980 | |
4430835 | Ericson | Feb 1984 |
Number | Date | Country |
---|---|---|
2136630 | Feb 1973 | DEX |
2358563 | May 1974 | DEX |
2657614 | Jul 1977 | DEX |
1953109 | Aug 1978 | DEX |
572894 | Feb 1958 | ITX |
Entry |
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Civil Engineering vol. 53, No. 7, p. 16. |