Cook's Thesaurus: Buckwheat - http://www.panix.net/~donwiss/recipes/buckw3.txt Gives synonyms, equivalents, and substitutes for buckwheat products. Includes photographs of the different forms of buckwheat.
Minn-Dak Growers: Buckwheat - http://www.panix.net/~donwiss/recipes/buckw3.txt Describes the different forms of buckwheat (groats, grits, kasha, flours) and compares the nutritional information.