<p>Another real analysis textbook:
[William</a> Trench - Trinity University Mathematics](<a href=“http://ramanujan.math.trinity.edu/wtrench/misc/index.shtml]William”>William Trench - Trinity University Mathematics)</p>
<p>Economics:
[Introduction</a> to Economic Analysis](<a href=“http://www.introecon.com/]Introduction”>http://www.introecon.com/)</p>