and small parts of West Virginia, Pennsylvania, New York, Vermont, and Maine ^ “Michigan in Brief:Information About the State of Michigan” (PDF). Michigan
Schenk Jr., Tom (2010). “Developing a Conceptual and Operational Definition of Stem for Iowa Community Colleges”. SSRN: 1831973. https://www.researchgate
“Oklahoma Colleges:A Profile of College Degree Programs & Post-Secondary Education in Oklahoma”. 2012年5月4日閲覧。 ^ “Census Regions and Divisions of the United