???????? ?? ???????? ?????? ??? ????? ??????? ???????? ????????? ????? ?????? ?????? ??????? ???? ???? ?????? ??? ????? ????? ????.
?????? ????? ????? ?? ?????? ?? ??????? ??? ????? ?????? ?????? ?????? ?????? ???? ????????? ??????? ????????? ??????? ?????? ??????? ??????? ?? ??????? ??????? ??? ??? ???.
????? ?????? ?? ??????????? ?????? ?? ??????? ??? ???? ??????? ???? ?????? ??? ???? ?????? ????? ??????? ?????????? ????? ????? ?????. ??? ??? ?????? ??: ????? ?????? ????? ??? ?????????
https://www.mclanahan.com/blog/five-things-you-didnt-know-about-gypsum
/ar/blog/5-most-valuable-things-you-need-to-know-about-gypsum.html
https://homeguides.sfgate.com/gypsum-dangers-81601.html
https://fabe.osu.edu/sites/fabe/files/imce/files/Soybean/Gypsum%20Bulletin.pdf
