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<ref>{{cite web |title=Semiconductors: Thyristors and more |url=https://edisontechcenter.org/semiconductors.html |publisher=Edison Tech Center}}</ref>
<ref>{{cite web |title=SCR is 50 Years Old |url=https://ieeemilestones.ethw.org/w/images/5/52/Milestone_Reference_1-SCR_50_Yrs_Old_Owen_IASMag_2007.pdf |publisher=IEEE Industry Applications Magazine}}</ref>
<ref>{{cite
and commercialized by Frank W. "Bill" Gutzwiller in 1957.
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