Beisembaeva, L., Smagylova, D., Mahmut, G., Omarov, A. and Tanasheva, M. (2011) “The technology of complex processing of phosphogypsum and polyhalite in chemical ameliorator”, Chemical Bulletin of Kazakh National University, 64(4), pp. 42-45. doi: https://doi.org/10.15328/chemb_2011_442-45.