On a slightly different note...

[kirby1024]

A notable indicator of the poor image quality of original source material is when Google Scholar has to be fired up to find the author of a given reference, because the name in the source material can't even be read by human eyes.

It's also a notable indicator of the poor image quality of original source material when you've spent the past 7 man-hours on the same page, correcting. And you made sure for those two pages to use the highest resolution on the scanner...