“VARIABILITY OF NORMALIZED DIFFERENCE VEGETATION INDICES IN SUMATRA AND ITS RELATION TO CLIMATE ANOMALIES(KERAGAMAN INDEKS VEGETASI DI SUMATERA DAN HUBUNGANNYA DENGAN ANOMALI IKLIM)”. Agromet, vol. 19, no. 1, June 2005, pp. 21-38, https://doi.org/10.29244/j.agromet.19.1.21-38.