...from the Daily Oklahoman newspaper archives dated:

03/27/1992
THOMPSON, Marynette R., age 99,
died March 24, 1992. Private graveside
services were held Thursday at
Memorial Park Cemetery.
Hahn-Cook/Street & Draper
6006 NW Grand Blvd
(405) 848-3744


...this is the only mention of her death. Maybe you could write to the funeral home and request a copy of her funeral record, for next of kin info and such. Hope this helps... :-))