Lesson 4 image credits
Public domain:
https://commons.wikimedia.org/wiki/File:House_cleaning.jpg
Public domain:
https://commons.wikimedia.org/wiki/File:WE_Bok_CHM_VA0908.jpg
Public domain:
Need to re-find in Wikimedia Commons.
Public domain:
https://commons.wikimedia.org/wiki/File:Hlade%C4%8Dek_Karel.jpg
Public domain:
Need to re-find in Wikimedia Commons.