Geographic Alliance, Michigan. "Ecosystems and Biodiversity Lesson 1 : Ecosystem Basics". OER Commons. Institute for the Study of Knowledge Management in Education, 11 Dec. 2019. Web. 28 Apr. 2024. <https://goopenmichigan.org/authoring/372-ecosystems-and-biodiversity-lesson-1-ecosystem-bas>.
Geographic Alliance, M. (2019, December 11). Ecosystems and Biodiversity Lesson 1 : Ecosystem Basics. OER Commons. Retrieved April 28, 2024, from https://goopenmichigan.org/authoring/372-ecosystems-and-biodiversity-lesson-1-ecosystem-bas.