共 50 条
- [25] PROBLEMS OF ANALYTIC CHEMISTRY AT 20TH INTERNATIONAL CONGRESS [J]. INDUSTRIAL LABORATORY, 1965, 31 (10): : 1606 - &
- [27] The 20th International Geological Congress, Mexico (1956) [J]. EPISODES, 2009, 32 (03): : 194 - 207
- [28] The 20th International congress of theoretical and applied mechanics [J]. Prikladnaya Mekhanika, 2000, 36 (08):
- [29] 20TH INTERNATIONAL CONGRESS OF PURE AND APPLIED CHEMISTRY [J]. JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH, 1966, 25 (04): : 164 - &