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I don't know where Louise and Oscar were married or when but according to SSDI Louise Metcalf born 3 Apr 1903, died 30 May 1988, last zip code 64730, SS# 493-52-6652. Oscar born 18 Jan 1902, died June 1974, Butler, Missouri, Bates County, last known zip 64730, SS# 488-36-2260. You can put in SSDI and do a search to get the information, you can send for more information from SS.
I don't know where Dale and Mary Lou were married. You might try a library on Missouri Marriages, or courthouse in Jefferson City, Mo.