http://www.cbsnews.com/videos/the-debate-on-child-farm-labor/
Kennett Square Mushroom farms: https://www.marketplace.org/2017/06/13/business/mushroom-farmers-dependent-immigrant-labor-fear-worker-shortage
http://www.huffingtonpost.com/2012/12/13/migrant-farm-workers-un_n_2296231.html