Central Korea during the first impulse of the Communist Spring Offensive 1951 (situation 30 April 1951 and operations since 22 April 1951)
History Department, United States Military Academy
<a rel="nofollow" class="external text" href="https://www.westpoint.edu/sites/default/files/inline-images/academics/academic_departments/history/Korean%20War/Korea19.pdf">Central Korea, Communist Spring Offensive, Situation 30 April 1951 and Operations Since 22 April and UN Probing Attacks, 1-10 May</a>, The Korean War