日月交食基本原理

Ri yue jiao shi ji ben yuan li, Hu Jiqin bian zhu.

胡継勤. By: Material type: TextTextPublication details: 北京 商务印書館 1959. Publication details: Beijing, Shang wu yin shu uan 1959.Description: 91 p. illus. 19 cmSubject(s): LOC classification:
  • QB175 .H8
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