Knowledge Management System of Purple Mountain Observatory，CAS
| Subject Area | 天文和天体物理学 |
| 银河系中可能有多少外星文明世界《北京UFO研究》 | |
| 刘炎 | |
| 2014 | |
| Department | 中国科学院紫金山天文台 |
| Document Type | 文集 |
| Identifier | http://libir.pmo.ac.cn/handle/332002/11550 |
| Collection | 科普文集_刘炎_科普文集 |
| Recommended Citation GB/T 7714 | 刘炎. 银河系中可能有多少外星文明世界《北京UFO研究》. 2014. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 201502169银河系中可能有多少外星（4266KB） | 开放获取 | CC BY-NC-SA | Application Full Text | |||
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