00491naa#a2200169#i#450# EN\\bibl\23330 20241122113649.5 2542-1840 20180325b2018####ek#y0engy0150####ca RU ELEMENTS OF HEALTH-PRESERVING TECHNOLOGIES AT CHEMISTRY CLASSES Journal article Kemerovo Kemerovo State University 2018 4 с. Journal article local Rakir N. G. Cheremnova Tatiana V. jsocnet.ru