Family History Library Book List.
Korean Genealogical Guide is available on the internet.
Online collection of Korean genealogies is available on FamilySearch Korean Genealogical Collection. Click on "Browse on [number] images"
FamilySearch Wiki article South Korean History
FamilySearch Wiki article: South Korea Websites.
FamilySearch Wiki article: Korean Names
FamilySearch Wiki article: South Korea Emigration and Immigration