I just love foreign sources of info!
After searching for days, I was finally able to find an account of the Contra Wars that was: 1) written during the conflict by a person that experienced it but was not tied to either side and 2) great in familiarizing the reader with the history and context of the nation's troubles. So, not only can I use it as factual support for my claims, it's also a primary source!
Thank you Spanish newspaper! :D
