Seongbyeon cheukhu danja
성변측후단자(星變測候單子)
RO :
Seongbyeon cheukhu danja
MC :
Sŏngbyŏn ch’ŭk’u tanja
Year :
?-?
Categories :
Scholarship·Science and Technology>Natural Sciences
RT :
Danja
Seongbyeon
BT :
Cheonmunhak