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مصادر

Phosphorus / Encyclopaedia Britannica
https://www.britannica.com/sci....ence/phosphorus-chem

Facts About Phosphorus
https://www.livescience.com/28932-phosphorus.html

'The Devil's element': the da.rk side of phosphorus
https://www.theguardian.com/sc....ience/blog/2017/oct/

Hennig Brandt and the Discovery of Phosphorus
https://www.sciencehistory.org..../distillations/henni

The world's food supply depends on Morocco. Here's why
https://www.pri.org/stories/20....13-11-21/worlds-food

Morocco's OCP aims to dominate phosphate industry
https://www.northernminer.com/....subscribe-login/?id=

Phosphate Rock
https://mineralseducationcoali....tion.org/minerals-da

https://www.sciencedirect.com/....topics/earth-and-pla