THIS LAND IS YOUR LAND is exactly the tune of the Carter Family's "LITTLE DARLIN', PAL OF MINE".

Oh, little darlin', how I love you,
How I love you, none can tell,
If in your heart you love another,
Little darlin, pal of mine.

Woody's "SO LONG, IT'S BEEN GOOD TO KNOW YA" is to the tune of "BILLY THE KID" as done by the Sons of the Pioneers and also by Tex Ritter.(Woody did add the chorus)

I'll sing you the true song of Billy the kid,
I'll sing 'bout the desperate deeds that he did,
Out in the west with a gun in his hand,
At the age of 12 years he killed his first man.

When Billy The Kid was a very young lad,
In old Silver City he went to the bad,
...

Art