From the back cover:
This is the first comprehensive anthology of Korean poetry ever published in the English language. In it Peter H. Lee, a Korean scholar, has selected and translated the verse of his country, ranging from the beginning of the Silla Dynasty, in 57 B.C., to the middle of the twentieth century.
LKL adds: now republished by Routledge as Poems from Korea: From the Earliest Era to the Present, 2019.