I'm trying to obtain some format settings (or copyable code) for LaTeX documents.

Above is a screenshot of Walter Rudin's Principles of Mathematical Analysis (a book I'm sure many people here have seen before).
While I'm sure many people find the out-dated typeset rather ugly, I personally fell in love with it when I personally used this text as an undergraduate.
Now that I am in graduate school, I am finding myself creating mathematical documents in LaTeX much more frequently, and I have been trying to emulate this style for some time now. I know that it is typeset in "Times Roman" (according to the publisher), but those are all the details.
I have also noticed that there are other texts which have a similar look, yet are slightly different (for example, if you look at the other texts in Rudin's series, you'll notice slight changes, and this is probably a reflection of more modern type-set and changes to the font itself over the years). What particularly attracts me is the darkened font style (as if everything is bold, and what is bold is bold 2x).
Here is an example of what I mean:

This is taken out of Zygmund and Wheedon's text on measure and integration theory. The fonts are clearly quite similar, yet the ladder is "lighter" and not as "thick" as the former.
Anyway, I realize getting a format identical to Rudin's is probably impossible, so I would of course be happy with something as close as possible to the text formatting in Rudin.
Also, I know that it is off topic here, but I'm also interested in obtaining similar text formatting for my online blog, which has full HTML/CSS styling customization, so if somebody who is kind enough to help with the LaTeX happens to have a corresponding CSS design, that would be awesome!