TY - GEN AU - 이성우 PY - 2010/12/31 UR - http://repository.krei.re.kr/handle/2018.oak/19701 PB - 한국농촌경제연구원 TI - Establishment and Operation of Agricultural Extension System in Korea TT - Establishment and Operation of Agricultural Extension System in Korea TA - Lee, Sungwoo ER -