Di mian ci ce gong zuo gui fan /Guo jia di zhi zong ju ; [Guo jia di zhi zong ju shu kan bian ji shi bian ji]
Edition: Di 1 ban
Publisher: Di zhi chu ban she; Xin hua shu dian Beijing fa xing suo fa xing
Published: 1978
Place of publication: Beijing
Language: chi
Number of pages: 96
Subjects: Terrestrial Magnetism