Looking for Information on Vera Denton Clifford Denton Born 1918 1930

I am seeking information on my grandparents Vera Denton & Clifford Denton I believe they were born somewhere betwen 1918-1930, I know they had 11 children:
david
keith
darrel
peggy
rita
diane
janice
jackie
kimberly
Thomas Dennis 1/31/1956-03/29/1982(my dad)
baby

my father passed when I was just a baby and I have not had contact with his family so I only know what my mother can remeber.
I would like to find out when and where they were born as well as passed away, and also information on their parents and siblings, any information will be helpful.