@book{albertson_mitchem_poling_safley_sutton_2007, title={The North Carolina winegrape grower's guide}, publisher={Raleigh, NC: N.C. Cooperative Extension Service}, author={Albertson, A. L. and Mitchem, W. E. and Poling, E. B. and Safley, C. D. and Sutton, T. B.}, year={2007} }