↑Jacqueline Bergeron, ed. (2013). Highlights of Astronomy: As Presented at the XXIst General Assembly of the IAU, 1991. Springer Science & Business Media. p.521. ISBN9401128286.
↑"Johann Baptista van Helmont". History of Gas Chemistry. Center for Microscale Gas Chemistry, Creighton University. 2005-09-25. Retrieved 2007-02-23.
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.