1988. Effects of Rootstock and Interstock on Seasonal Changes in Foliar Nutrient (N, P, K, Ca) Composition of ‘Delicious’ and ‘Golden Delicious’ Apple. Journal of the American Pomological Society. 42, 1 (Jan. 1988), 9–14. DOI:https://doi.org/10.71318/apom.1988.42.1.9.