Viégas, Ismael de Jesus Matos, and Henrique Paulo Haag. “ Levels of NPK on Nursery of Hevea Spp on the Development of Plants Ready for Grafting in a Sandy Clay Loamy Yellow Latosol, in Mosqueiro Island - PA, Brazil ”. Anais Da Escola Superior De Agricultura Luiz De Queiroz, vol. 42, no. 2, Jan. 1985, pp. 489-38, https://doi.org/10.1590/S0071-12761985000200012.