Учебники по окружающему миру для 4 класса часть 1 ... - VK
: Often stocks the hardback FGOs edition. Check Labirint.ru for current availability.
: Carries the standard school curriculum editions at My-shop.ru .
If you are looking for a physical copy with a durable "solid paper" (hardback) cover, you can check the following major retailers. Prices generally range from for new editions.
The SPK Distance Learning Portal offers a direct download for the School of Russia (Shkola Rossii) curriculum.