Looking for a death certificate for my great great grandma

Lillian Marie Marsh Rose
B. 2 march 1916 in Ohio
D. 9 Jan 1990 In Las Vegas Nevada

I am trying to find out if she lived there, or if she died there visiting family. As far as I can find, she lived until her mid 20's in Ohio, and her husband lived nearly all his life (as far as I can see) in Michigan. So I know she died in NV (according to death cert) but I am not sure where she actually lived at that time. Trying to figure out what cemetery she may be in...not sure if I look near Vegas, or near her husbands home in Michigan. He husband died 7 years after her in Michigan.

Any help would be greatly appreciated.

Thank you