Christoph, Margaret (October 1985). "Mole day". The Science Teacher. 52 (7): 47–48. JSTOR24145769. Archived from the original on October 24, 2022. Retrieved October 24, 2022.
Christoph, Margaret (October 1985). "Mole day". The Science Teacher. 52 (7): 47–48. JSTOR24145769. Archived from the original on October 24, 2022. Retrieved October 24, 2022.