Info 37: another historic girls in bibs

I found another images from FSA by coincidence (unedited)

First two: Children of migratory carrot pullers, Mexicans. Imperial Valley, California. 8b31731. Dorothea Lange. 3rd is "Eighteen year-old mother from Oklahoma, now a California migrant" 8b31802. I'm not sure, if they are bibs. And I wonder who the guy on the left is. There are also at least 3 more images of this woman.