I would like to know the water content of all kinds of foods.  Is
there a journal article or website that has this information?  Better
still, is there a "water content counter" (I know there are lots of
calorie counters around)

I found a listing on the internet, but I need an article or listing
that contains hundreds of food items with their water contents. 
Here's the listing I found:

http://waltonfeed.com/self/h2ocont.html

I would prefer an online information source, rather than a book.

Thank you