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Main provisions of the crystals theory:
Practical techniques:
Citric acidCitric acid, Oleg Grigor`evOleg Grigor`evVKontakte
Potassium chloridePotassium chloride, Inna MudrikInna MudrikVKontakte
Potassium chloridePotassium chloride, Vladimir RomanivVladimir RomanivVKontakte
Magnesium sulfateMagnesium sulfate, Crystalchase21Crystalchase21Crystalverse.com