7. You have to sweep the floor thoroughly every day. 8. Dust off, as well as possible. 9. Open the windows wide in the whole house.
Publisher: Glavpolitprosvet, Moscow
(Stencil, 53x110.5 cm., inv.nr. BG L3/18)

Third part of a Rosta. See also nrs. 11 (with commentary), 12 and 14.