共 25 条
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- [4] CALDER W, 1936, HARVARD ANN, V105, P453
- [5] GRATTON, 1939, PUB STOCKHOLM OBS, V13
- [6] GREENSTEIN, 1947, PUB ASP, V59, P141
- [7] HERBIG GH, UNPUB
- [8] HERBIG GH, 1948, PUB ASP, V60, P257
- [9] HERTZSPRUNG, 1947, LEIDEN ANN 1, V19
- [10] Joy A. H., 1946, PASP, V58, P244