Veloso, Antonio V., and Tung Ly. “EFFECT OF CHLORINE SOURCES AND AMMONIUM SULFATE ON THE GROWTH OF COCONUT SEEDLINGS GROWN ON FOUR SOIL TYPES”. Annals of Tropical Research, vol. 4, no. 3, Sept. 1982, pp. 224-30, https://atr.vsu.edu.ph/article/view/759.