Tarihoran, P., Siregar, A. Z. and Marheni (2020) “Diversity Index of Insect Species on Sorghum Plantations in Kolam Village, Percut Sei Tuan District, Deli Serdang”, Indonesian Journal of Agricultural Research, 3(2), pp. 89 - 104. doi: 10.32734/injar.v3i2.3865.