Adams devotes almost a whole chapter to Lange in his Autobiography. He admired her a lot, they did joint assignments, even though their different temperaments caused frictions. Nowhere does he mention printing "Migrant Mother." He probably would have had he done so.
Here are a couple of excerpts:
"In 1935 President Roosevelt established the Resettlement Administration, to aid the thousands of farmworkers unemployed because of the great quantities of land that had become a dust bowl, unable to produce crops. Within this organization was the FSA, led by Roy Stryker, which assembled photographers to record American rural life. Dorothea was, in my opinion, the superior artist in that group. Her great photograph, Migrant Mother, Nipomo, California, 1938, is as compelling aesthetically as it is as a document. My associations with Dorothea were both rewarding and perplexing. No one could dispute her gifts and her extraordinary energy. Her political/social views were quite definite, yet discreetly restrained in her professional and public contacts. I recall many discussions among our close friends and colleagues as to whether she leaned to Leninism or Trotskyism and whether she was a Communist Party member or not. She implied her sympathies in her work, but usually did not make obvious images or pronouncements along any party line. There was great integrity in her beliefs and opinions, and great skepticism about the complacent society around her and the avowed “Good Old Boy” attitudes of industry as well as the general machinations of politics..."
"...In spite of the occasional difficulties I had while working with her, I wish to affirm Dorothea’s extraordinary qualities as a photographer. I learned much from her devotion to the art and the severe application of discipline and effort in everything she did. I used one of her photographs, White Angel, Bread Line, San Francisco, in Making a Photograph as an example of powerful creative photography applied to a social situation. Dorothea and I had a lively correspondence, freely expressing our philosophical disagreements about photography and life in general."