Akhmetkaliyeva, M. S., Sassykova, L. R., Aubakirov, Y. A. and Kosmambetova, G. R. (2017) “Fractional composition of compounds of zinc and lead in light chestnut soils”, International Journal of Biology and Chemistry, 10(1), pp. 89–91. doi: 10.26577/2218-7979-2017-10-1-89-91.