Fisher, Jami N.Tamminga, MeredithHochgesang, Julie2023-05-222023-05-222016-03-072019-08-09https://repository.upenn.edu/handle/20.500.14332/33122Philadelphia Signs Project video with participant discussing how signing has changed over time.http://creativecommons.org/licenses/by-nc-sa/4.0/Philadelphia Signs Projectsociolinguisticsdeafsign languageAmerican Sign LanguageASLregional variationLanguage Description and DocumentationArticle