2018-11-15T07:40:13Z 2018-11-15T07:40:13Z 1984-04 C1984-03 http://repository.krei.re.kr/handle/2018.oak/13034 농용트랙타(33마력) 원가조사 A research on the costs of agricultural tractors (33 horsepower) KREI 보고서 9999-12-31 9999-12-31