Fortifying the Home Front (from Business as Usual)
He Will Always Remember the Little Things You Do
The Homes They Leave Behind
I'd Be Proud to Be the Mother of a Soldier
Jolly Good Luck to the Girl Who Loves a Soldier
Kitty the Telephone Girl
Mother (Her Soldier Boy)
Mother's Sitting Knitting Little Mittens for the Navy

Source
Record companies encouraged the war effort in their advertisements. This ad for "records of victory", mentions the purchase of Victory Bonds, Toronto Daily Star, November 13, 1918, p. 9
The Rose of No Man's Land
Sister Susie's Sewing Shirts for Soldiers
That's a Mother's Liberty Loan
There Is a Service Flag Flying at Our House
There's a Vacant Chair in Every Home Tonight
We'll Do Our Share While You're Over There
What Are You Going to Do to Help the Boys