Take a look at your course readings dealing with pre-Columbian or colonial cities in the Americas. Take a look at the citations, references, the bibliographies that the authors used.
Every article builds upon preexisting scholarly conversations and pushes the field forward with new knowledge. By investigating the articles that an author used in their research, you can find where that author got their information.
The easiest way to find out who cited a work is to use Google Scholar.
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