Of course, there are several great books on weeds with beautiful
pictures that are available and very helpful, as well. There are also
several CDs with software that help you select plant features
interactively.

If you want to go hi tech, you can load a CD into your laptop and carry
it into the the woods? Also, don't forget to bring your GPS, as well,
to note the location of important species!

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EWIRM: Ergonica Weed Identification Reference Matrix