RT Journal Article SR Electronic T1 Maturity of Grapes as Related to pH at Harvest JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 42 OP 46 DO 10.5344/ajev.1955.6.2.42 VO 6 IS 2 A1 William V. La Rosa YR 1955 UL http://www.ajevonline.org/content/6/2/42.abstract AB