https://www.techtimes.com/articles/47600/20150421/betty-willis-designer-of-welcome-to-fabulous-las-vegas-sign-dies.htm
Betty Willis, Designer Of 'Welcome To Fabulous Las Vegas' Sign, Dies
Apr 21, 2015 - Betty Willis, the designer of the iconic Welcome to Fabulous Las Vegas neon sign, has passed away. She was 91 years old.
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https://www.phillyvoice.com/betty-willis-designer-iconic-las-vegas-sign-dies/
Betty Willis, designer of iconic Las Vegas sign, dies at 91 | PhillyVoice
Apr 21, 2015 - Betty Willis, designer of iconic Las Vegas sign, dies at 91
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