Good examples of mathematical writing (structural organization, style, typesetting, and so on)

While I was trying to get pdfs of books written by Polya, I came across an award named after him here:

http://www.maa.org/programs/maa-awards/writing-awards

Looks like there are a whole slew of awards given to outstanding articles/papers/books:

1. http://www.maa.org/programs/maa-awards/writing-awards/carl-b-allendoerfer-awards
2. http://www.maa.org/programs/maa-awards/writing-awards/chauvenet-prizes
3. http://www.maa.org/programs/maa-awards/writing-awards/hasse-prizes
4. http://www.maa.org/programs/maa-awards/writing-awards/trevor-evans-awards
5. http://www.maa.org/programs/maa-awards/writing-awards/george-polya-awards
6. http://www.maa.org/programs/maa-awards/writing-awards/paul-halmos-lester-ford-awards
7. http://www.maa.org/programs/maa-awards/writing-awards/robbins-prizes-0

These links link you to various awards given for good quality research and writing; you can see past winners and encounter good papers.

But you've specifically asked for papers with good organised writing structure, so these links below are the awards given specifically, for outstanding articles and expository papers:-

1. Levi Covenant award: http://www.ams.org/profession/prizes-awards/ams-prizes/conant-prize
2. George Polya award: http://www.maa.org/programs/maa-awards/writing-awards/george-polya-awards
3. Paul R. Halmos - Lester R. Ford Awards: http://www.maa.org/programs/maa-awards/writing-awards/paul-halmos-lester-ford-awards
4. David P. Robbins Prize: http://www.ams.org/profession/prizes-awards/pabrowse?purl=robbins-prize

Being a tenth grader, I obviously haven't had much exposure to papers (Mainly because the vast array of contemporary papers are in journals which require you to subscribe to them by providing verification that you're a professional in some field of math/science; I'm not).

But, coincidentally, I had come across a paper I thought was excellent and saved it. Looks like it was the recipient of the fourth award I've mentioned in the aforementioned list; the David P. Robbins Prize. It's written by Thomas C. Hale.

http://annals.math.princeton.edu/wp-content/uploads/annals-v162-n3-p01.pdf

I think it's really good and is really clear. Very organised as well, providing contents as well as a useful Index.

If I come across better ones, I shall update this post.