Home/Reference/Social Sciences/경제학/경제사/운수, 무역, 에너지, 기술 및 기타 서비스/U.S. • Canada: Pre-1913U.S. • Canada: Pre-1913PaperMind(으)로 주제 찾기곧 제공Find papers & topicsTools & resources☆내 서재에 추가⤓PDF로 저장▦슬라이드 다운로드Learn & explore▷듣기►동영상곧 제공Methods for this conceptHistorical Archival ResearchDigital Historical Archival ResearchNatural ExperimentCross-sectional Descriptive ResearchResearch Question FormulationDescriptive ResearchDocument CollectionCross-sectional ex post facto designRelated conceptsU.S. • Canada: Pre-1913U.S. • Canada: Pre-1913U.S. • Canada: Pre-1913U.S. • Canada: Pre-1913U.S. • Canada: Pre-1913U.S. • Canada: Pre-1913