I associated the topic with child labor because I think that the topic of the photo essay to accompany Landsberg's article would be well centered on the graphical experience childhood robbed from children. Landsberg details how painful this process is to children. She discusses the reality of all children who are forced to "grow up" far too quickly for a materialist world that places no value on their experiences:
Thirteen and fourteen year old girls work 17 hour days at their sewing machines in Manila sweatshops. They pay 13 cents an hour. That's better than the one cent a day earned by 5 year olds who weed the tea plantations in Sri Lanka.
Landsberg's article cries out for change in this reality. It is here where I think showing pictures of child labor around the world will help craft a very compelling photo essay to accompany her article.
The child labor collection of images in the Child Labor and the Global Village: Photography for Social Change group would be a good starting point. Legally credited photographs (photographer, owning organization/individual) from organizations such as Reuters or Getty Images could also prove to be of great assistance in your photo essay as they provide the images that accompany Landsberg's ideas.
Finally, I would suggest investigating the work of Sebastiao Salgado. One of the world's most powerful photographers, Salgado's specialty is giving visual voice to those who lack it. His collection of photographs in his works such as The Children contain images that would make an excellent accompaniment to your photo essay. Putting his pictures to her words makes for a very compelling work sample. This would help to make the plight of so many of the world's children no longer "anonymous."