Freund, F. T. (2007). Pre-earthquake signals – Part I: Deviatoric stresses turn rocks into a source of electric currents. Copernicus Publications.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Freund, F. T. Pre-earthquake Signals – Part I: Deviatoric Stresses Turn Rocks into a Source of Electric Currents. Copernicus Publications, 2007.
MLA -ийн эшлэл (9 дэх хэвлэлт)Freund, F. T. Pre-earthquake Signals – Part I: Deviatoric Stresses Turn Rocks into a Source of Electric Currents. Copernicus Publications, 2007.
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