Ci pian jiao yu di zhen

An edition of Ci pian jiao yu di zhen (1981)

Ci pian jiao yu di zhen

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Publish Date

1981

Publisher

Di zhen chu ban she,Xin hua shu dian Beijing fa xing suo fa xing

Language

chi

Pages

98

Description:

subjects: Magnetic instruments, Magnetic declination, Earthquake prediction