![PDF) Teacher and student response to the removal of dirty electricity by the Graham/Stetzer filter at Willow Wood School in Toronto, Canada PDF) Teacher and student response to the removal of dirty electricity by the Graham/Stetzer filter at Willow Wood School in Toronto, Canada](https://i1.rgstatic.net/publication/228993707_Teacher_and_student_response_to_the_removal_of_dirty_electricity_by_the_GrahamStetzer_filter_at_Willow_Wood_School_in_Toronto_Canada/links/02bfe50fd00aedfcd2000000/largepreview.png)
PDF) Teacher and student response to the removal of dirty electricity by the Graham/Stetzer filter at Willow Wood School in Toronto, Canada
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![PDF) Teacher and student response to the removal of dirty electricity by the Graham/Stetzer filter at Willow Wood School in Toronto, Canada PDF) Teacher and student response to the removal of dirty electricity by the Graham/Stetzer filter at Willow Wood School in Toronto, Canada](https://www.researchgate.net/profile/Magda-Havas/publication/228993707/figure/fig2/AS:669250356248593@1536573127428/Response-of-teachers-at-Willow-Wood-School-to-improved-power-quality-with-Graham-Stetzer_Q320.jpg)