ALLGOOD, ASHTON. "PBS Chemistry Chapter 02, Lesson 02 - Classification of Matter". OER Commons. Institute for the Study of Knowledge Management in Education, 02 Dec. 2019. Web. 28 Nov. 2024. <https://goopennc.oercommons.org/authoring/2761-pbs-chemistry-chapter-02-lesson-02-classification>.
ALLGOOD, A. (2019, December 02). PBS Chemistry Chapter 02, Lesson 02 - Classification of Matter. OER Commons. Retrieved November 28, 2024, from https://goopennc.oercommons.org/authoring/2761-pbs-chemistry-chapter-02-lesson-02-classification.