I was in the PALM BEACH MEMORIAL PARK a week ago,
which is in LANTANA, FLORIDA, Palm Beach County, and
I wrote down some information while I was there.
They are buried in this cemetery,
and have seperate flat headstones,
which read;

CONSTANTIN BIBER
1893-1987

ALIDE M. BIBER
1908-1966

(I hope this information helps someone.)