In the pages you linked, they’ve mixed businesses and personal lines, and bolded the business lines. In some states, there was a separate section in the back (On blue pages? Wasn’t there a red section too?) with just the business listings. Still, not a big deal either way.
Even with the yellow pages, listings were alphabetical, and grouped by business type, and businesses could pay for bigger listings. I’d forgotten how information dense listings used to be (probably due to lack of filtering, but it still makes me want yelp to do better)
I do not think this is true, some businesses got special stuff in the white pages.