@article {MATTICK49, author = {LEONARD R. MATTICK}, title = {A Method for the Extraction of Grape Berries Used in Total Acid, Potassium, and Individual Acid Analysis}, volume = {34}, number = {1}, pages = {49--49}, year = {1983}, doi = {10.5344/ajev.1983.34.1.49}, publisher = {American Journal of Enology and Viticulture}, issn = {0002-9254}, URL = {https://www.ajevonline.org/content/34/1/49}, eprint = {https://www.ajevonline.org/content/34/1/49.full.pdf}, journal = {American Journal of Enology and Viticulture} }