found: The Wizard of Oz [MP] 1939:credits (screenplay, Florence Ryerson)
found: Theatre, film and television biographies master index, 1979(Florence Ryerson; b. 1892; d. 1965)
found: LC data base, 4/3/87(hdg.: Ryerson, Florence)
found: Wikidata via Wikipedia, September 27, 2019(alias: Florence Ryerson, Флоренс Райэрсон, פלורנס ריירסון; instance of: human; place of birth: Glendale; place of death: Mexico City; date of death: +1965-06-08T00:00:00Z; sex or gender: female; country of citizenship: United States of America; given name: Florence; date of birth: +1892-09-20T00:00:00Z; occupation: screenwriter, playwright, writer; VIAF identifier: 29740570; FAST-ID: 1478127; educated at: University of Michigan; Internet Broadway Database person ID: 5538; LCAuth identifier: n85151543; IMDb identifier: nm0753249; SNAC Ark ID (P3430): w6cp0pmg; ISNI (P213): 0000000063018671; BNE identifier: XX1539735; CONOR identifier: 101267299; ISFDB author ID: 141790; surname: Ryerson; BnF identifier: 14134217r; SUDOC authorities: 067132731; languages spoken or published: English; NKC identifier: xx0191578; described by source: Obalky knih.cz; description/label: American playwright, američka scenaristkinja, Amerikaans scenarioschrijfster , америчка сценаристкиња, 弗洛伦斯*赖尔森, 弗洛倫斯*賴爾森) - http://www.wikidata.org/entity/Q5460771