Geographic Alliance, Michigan. "Ecosystems and Biodiversity Lesson 3 : Ecosystems". OER Commons. Institute for the Study of Knowledge Management in Education, 18 Feb. 2020. Web. 19 May 2024. <https://goopenmichigan.org/authoring/374-ecosystems-and-biodiversity-lesson-3-ecosystems>.
Geographic Alliance, M. (2020, February 18). Ecosystems and Biodiversity Lesson 3 : Ecosystems. OER Commons. Retrieved May 19, 2024, from https://goopenmichigan.org/authoring/374-ecosystems-and-biodiversity-lesson-3-ecosystems.