共 33 条
- [21] 1928, AP J, V67, P305
- [22] 1934, AP J, V79, P351
- [23] 1923, LICK OBS B, V11, P118
- [24] 1918, LICK OBS B, V9, P157
- [25] 1931, AP J, V74, P225
- [26] 1926, PUB ASP, V38, P93
- [27] 1932, LICK OBS PUB, V18, P208
- [28] 1933, AN, V248
- [29] 1925, PUB DOM OBS, V9, P26
- [30] 1918, LICK OBS B, V9, P160