Since downloading files from random sites can be risky for your device, I've summarized the best ways to access this material safely and how to use it effectively for your essay or homework. 1. Where to Find it Safely
Many Russian educational sites provide "Read Only" versions of the textbook and workbook if you just need to reference the text for your essay. 2. How to Use GDZ for an Essay
It looks like you are searching for a digital copy or the answer key (GDZ) for the by K.I. Kaufman and M.Y. Kaufman.