My 2nd great grandfather, Joseph Zenophile Lanctot, died on 20 Jul 1913 in Armour (Douglas Co.), South Dakota. He was born on 15 Jan 1860 or 1861. He was a hotel keeper and was survived by his wife, Eliza (Bourke) Lanctot.

Eliza died on 22 Dec 1930 in Armour.

I am trying to determine what newspaper(s) would have carried the obituaries for both of them, and where those archived papers might be kept.

Any help is MUCH appreciated!