Although it is out of print, the book SUCCESSFUL WATERFOWLING, by Zack Taylor, has a wealth of information on building different blinds. Maybe you can find a copy in your library or a used book shop.
While not as detailed as the above book, the bood DUCK HUNTING from the hunting and fishing Library series (Cowles Creative Publishing) (usually you can find these at Borders, Gander Mountain, ect) has some good basic information and photos. Good luck.