Selecting Grape Cutlivars and Planting Sites in Idaho, at http://info.ag.uidaho.edu/Resources/PDFs/CIS1043.pdf

Colorado Grape Growers' Guide, at http://www.colostate.edu/programs/wcrc/Viticulture/GrapeGrowersGuide1998.pdf

Cornell's "Pruning Fruit Trees, Grapes and Berries", at http://counties.cce.cornell.edu/chemung/publications/pruning-fruit-trees-grapes-berries.pdf