First of all: Cemeteries has all e's!
If you have a copy of their death certficates, it would show the cemetery. If you do not have it, try writing to:
The Mass. Archives @ Columbia Point, Morrissey Blvd, Boston, Mass. or the Registry, Mt. Vernon St, Boston, Mass. (They are close to each other and very near the JFK Memorial Library at Columbia Point.)
If it's a church run cemetery, then you must comtact the sexton. If it's a city run cemetery, you must contact the
Cemetery Dept. of the city. Good luck.