Z. Kassab-Bashi, A., عمار, Th. Saieed, N., ناظم, M. Omar, O. and عمر 2025. Doubling the Chromosome Number of Black Poplar Trees (Populus nigra L.) by Colchicine In vitro. Rafidain Journal of Science. 25, 5 (Jun. 2025), 1–16. DOI:https://doi.org/10.33899/rjs.2014.131363.