I'm writing a research paper comparing the economic policies of the Delhi Sultanate Era with the Mauryan Empire, but I'm having trouble identifying reliable sources and structuring the analysis to avoid oversimplification. How can I approach this effectively?

For my university history project, I've read standard textbooks like those by Satish Chandra for the Delhi Sultanate and Romila Thapar for the Mauryan period, but I'm concerned my comparison might be too broad. I've tried outlining key points like taxation systems and trade, but I need guidance on selecting credible primary sources and organizing the content to highlight nuanced differences.