The Oklahoman (metro OKC newspaper) does not have an obit for Bert Marsh, only a death notice. However, he is mentioned in an obit for Minnie Dennis Canipe. The online obit is a bit hard to read, so transcription errors could be mine. I can email you a jpeg if you like.
Oklahoman - Wednesday, April 08, 1992 CANIPE Minnie Dennis, born Jan. (maybe Jun) 4, 1912, Little Rock, Ar., died April 4, 1992. She came to the OKC area in 1987 (maybe 1967) from Memphis, Tn. where she had lived most of her life. She was a retired executive with Schering Plough, Inc. where she worked for more than 3(?) years. She was a member of Kentucky Ave. Baptist Church. She is survived by her son, Bert M. Marsh Jr. of Del City; a sister, Jean Boswell of Carrollton, Tx.; brothers, Patrick L. and O.W. "Bill" May of Memphis, and Ralph of Garland, Tx.; 5 grandchildren, Stacy Marsh of Memphis, Michael Marsh and Denise McDonald of Coldwater, Ms., Bert M. Marsh III of Dallas, Tx. and Christine Ho of Pearl City, HI; and 5 great grandchildren. Memorial services will be held at 2:00 p.m. Saturday, April 11, 1992 at Kentucky Ave. Baptist Church, Rev. Stanley Daniels officiating.