Her headstone has the incorrect death day. It has the 20th and her death index and obituary list it as the 19th.

MRS. THELMA M. DEE

DURHAM – Funeral services for Mrs. Thelma Martin Dee, 41, who died Thursday, will be held Monday at 2 p.m. in Greystone Baptist Church. Burial, McMannen Methodist Church cemetery. Surviving: her husband, John B. Dee; her mother, Mrs. Nora Everett Martin of Durham; three sons, Robert R., John S. and William H. Dee of the home; a daughter, Susan L. Dee; of the home; two sisters, Mrs. Ruby Morrow of Durham and Mrs. Francis Pickett of Raleigh; a brother, Harvy [sic] Everett of Durham.

The News and Observer, Raleigh, North Carolina, Sunday, March 22, 1970, Page ll-11, column 5

Dee-Martin.

Miss Thelma Louise Martin, daughter of Mr. and Mrs. W. C. Martin of Durham, to John B. Dee, Jr., son of Mr. and Mrs. John B. Dee of New York City, on June 6 in the chapel of the First Baptist Church in Durham.

The News and Observer, Raleigh, North Carolina, Sunday, June 26, 1949, Page lll-3, column 3

North Carolina, U.S., Marriage Records, 1741-2011
Name: Thelma Martin
Gender: Female
Race: White
Age: 20
Birth Year: abt 1929
Marriage Date: 6 Jun 1949
Marriage Place: Durham, North Carolina, USA
Father: W C Martin
Mother: Nora Martin
Spouse: Jno Bertram Dee
Spouse Gender: Male
Spouse Race: White
Spouse Age: 22
Spouse Father: J B Dee
Spouse Mother: Stella Dee
Event Type: Marriage

Two CA death indexes:
California, U.S., Death Index, 1940-1997
Name: Thelma L Dee
Social Security #: xxxxx4722
Gender: Female
Birth Date: 6 Jul 1928
Birth Place: North Carolina
Death Date: 19 Mar 1970
Death Place: San Diego

California, U.S., Death Index, 1940-1997
Name: Thelma M Dee
Social Security #: xxxxx4722
Gender: Female
Birth Date: 6 Jul 1928
Birth Place: North Carolina
Death Date: 19 Mar 1970
Death Place: San Diego