Mc Lean Miller Clements Death

HI
I AM QUERYING THE DEATH OF DORIS ELIAZBETH THELMA MC LEAN SHE WAS THE WIDOW OF ERNEST JOHN REISCHBETH MC LEAN
HE DIED IN 1949 BURIED IN WTC ADELAIDE
AFTER HIS DEATH DORIS MOVED TO 129 GORE STREET FITZROY VICTORIA AND THE LAST ADDRESS I HAVE FOUND WAS 26 DICKENS ST CARLTON NTH VICTORIA
IN THE BILLION OF GRAVES INDEX THERE WAS A BURIAL FOR DORIS ELIZABETH MILLER DIED 13TH JAN 1991 AND A PROBATE FOR A DORIS MC LEAN STATES SHE DIED ON 7TH JULY 197I
FOUND A MEMORIAL ON A GRAVE AT SPRINGVALE BOTANICAL CEMETERY FOR A DORIS ELIZABETH MILLER WHO HAD PASSED AWAY 13TH JAN 1991 LOVED WIFE OF FRANK CLEMENTS

MY QUESTION :? IS THIS THE SAME PERSON WHO WAS ORIGINALLY MARRIED TO ERNEST R. J. MCLEAN AND DID SHE MARRY MILLER AND THEN FRANK CLEMENTS?

THANK YOU