Here are links to some posts I've written up about dandelions some time ago. Please feel free to add your information, too, and we'll all learn together.
Here is a blog post you may want to check out.
Also, check out my Classes page, scrolling to the bottom of the page where you'll see "Demonstration Videos". I used dandelion, my favorite weed (shhh - don't tell the others), as my demonstration plant. You'll get a bit more information from those, too.
For some extensive and excellent monographs, search online or in books. I decided to use my time to share my experiences with the herbs and grow quality herbs in the You Pick Medicinal Herbs Garden.
Feel free to add information that you find in your studies and experiences and we'll all learn together.