gala, vidhi. "Major Land forms of Earth". OER Commons. Institute for the Study of Knowledge Management in Education, 28 Aug. 2019. Web. 27 Nov. 2024. <https://oercommons.org/authoring/57571-major-land-forms-of-earth>.
gala, v. (2019, August 28). Major Land forms of Earth. OER Commons. Retrieved November 27, 2024, from https://oercommons.org/authoring/57571-major-land-forms-of-earth.