: A standard textbook for secondary vocational education.
Учебник по химии для ССУЗов Ю. М. Ерохин - Internet Archive iu.m.erokhin, gdz
for the chemistry textbooks by Yuri Mikhailovich Erokhin (Ю.М. Ерохин). : A standard textbook for secondary vocational education
You can sometimes find scanned copies of the textbook or the accompanying task books to cross-reference your work on academic platforms like the Internet Archive . iu.m.erokhin, gdz