Perliitti (vulkaaninen tuhka) (Finnish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Perliitti (vulkaaninen tuhka)" in Finnish language version.

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maximumyield.com

thespruce.com

  • Van Zile, Jon: All About Perlite Houseplant Basics. 18.9.2018. The Spruce. Viitattu 28.1.2019. (englanniksi)

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