
1	Presacral Tumor: Four Cases Report Eun Woo Lee, Jae Myeung Chun, Teck Jin Ahn J Korean Orthop Assoc.1988;23(6):1561-1566. Published online 2019 January 24 DOI: http://dx.doi.org/10.4055/jkoa.1988.23.6.1561