The Observatory of Zi-ka-wei: [fifty years of scientific work.

APA Citation

Xujiahui guan xiang tai (China). (1929). The Observatory of Zi-ka-wei: [fifty years of scientific work. [Paris?].

MLA Citation

Xujiahui guan xiang tai (China). The Observatory of Zi-ka-wei: [fifty Years of Scientific Work. [Paris?], 1929.

Warning: These citations may not always be complete (especially for serials).