Comet 27 P/Crommelin Observed in Ancient Korea.Published in:Journal for the History of Astronomy, 2019, v. 50, n. 4, p. 447, doi. 10.1177/0021828619877965By:Yong-Ki, Jong;Jik-Su, Kim;Chol-Jun, Kim;Chol-Min, ChoePublication type:Article