Kulisz, M., J.D. Zhumabekova, E.B. Firsova, Z. Aubakirova, and G. Zhairbaeva. 2022. “Implementation of the Quality Management System in the Enterprise Producing Bentonite Clay”. Bulletin of L.N. Gumilyov Eurasian National University Technical Science and Technology Series 141 (4):127-39. https://doi.org/10.32523/2616-7263-2022-141-4-127-139.