Chang Yŏng-sil ŭn hanŭl ŭl poatta
Subtitle: Kim Chong-nok changpʻyŏn sosŏl
Edition: Chʻopʻan
Publisher: Raendŏm Hausŭ Chungang
Published: 2005
Place of publication: Sŏul-si
Language: kor
Subjects: Fiction; Scientists
Description: Story of a scientist of the Chosun Dynasty, Chang Yong-sil, who invented a variety of astronomical clocks, sundials, water clocks and a rain gauge.