I actually figured out if I just search the word "introduction", then sift through the document hitting command B, I was able to separate out everything quickly.
Maybe a silly question: How hard would it be to automatically search an older PDF to build metadata for libraries? Everything goes by DOI's now, but those only go back to 2001. I have, now, thousands that are before, and it would be nice that have the authors, titles, etc., from each without having to individually add them in.