Obrázek je dostupný pod licencí Creative Commons
 

Autor: Věra Gošová

V komunikačních tabulkách, byly použity obrázky dostupné pod licencí public domain image z www.wpclipart.com.

http://www.wpclipart.com/transportation/assorted/rocket.png.html

http://www.wpclipart.com/transportation/aircraft/balloon/blimp.png.html

http://www.wpclipart.com/transportation/bicycle/bicycle_yellow.png.html

http://www.wpclipart.com/transportation/train/high_speed_train.png.html

http://www.wpclipart.com/recreation/boating/jetski.png.html

http://www.wpclipart.com/recreation/boating/whitewater_rafting.png.html

http://www.wpclipart.com/transportation/ambulance/ambulance_6.png.html