Uddin, M., Rahman, K., Rahman, M., Mohammad, N. and Islam, A.T. 2016. Development of union level digital databases and maps of maize growing areas at pirgonj in Thakurgaon District. Bangladesh Journal of Agricultural Research. 40, 4 (Mar. 2016), 693–702. DOI:https://doi.org/10.3329/bjar.v40i4.26943.