Sleeping bags for camping: how to choose
I didn't enjoy this article.
This article has four sections, number one pick a temperature rating, number two sleeping bag construction, number three sleeping bag features, and last but not least number four storage. Each section goes farther into detail, but you get the idea. this article is long, and full of helpful information. however there was a large amount of pictures.
Huffman, Kelly. Sleeping bags for camping: how to choose. www.rei.com, http://www.rei.com/learn/expert-advice/sleeping-bag.html