共 19 条
- [2] BECHTOLD MF, 1951, Patent No. 2574902
- [4] Bird P., 1941, US Patent, Patent No. [2244325, 2,244,325]
- [5] Caley E.R., 1929, J AM CHEM SOC, V51, P1664
- [6] DIMAIO V, 1950, Patent No. 2515949
- [7] EMBLEM HG, 1957, Patent No. 544022
- [9] ILER RK, 1946, Patent No. 2408655
- [10] KIRK JS, 1946, Patent No. 2408656