Jasi : Tofauti kati ya masahihisho
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Mstari 29:
*[https://web.archive.org/web/20070814041825/http://mineral.galleries.com/minerals/sulfates/gypsum/gypsum.htm Mineral galleries – gypsum]
*[https://www.cdc.gov/niosh/npg/npgd0308.html CDC – NIOSH Pocket Guide to Chemical Hazards]
{{mbegu-kemia}}
[[Jamii:Madini]]
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