annotazioni, fonti e crediti per i fotografi
(le cui foto sono pubblicate ciascuna sotto la relativa licenza Creative Commons)
#1 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/6503046115);
#2 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/6503046115);
#3 - Foto di thefinned1 (www.flickr.com/photos/thefinned1/2857784494);
#4 - Foto di Paul Robinson (www.flickr.com/photos/happyfunpaul/3603976245);
#5 - Foto di melanie m (www.flickr.com/photos/memsahib/521096049);
#6 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7298960540);
#7 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7321896192);
#8 - Foto di melanie m (www.flickr.com/photos/memsahib/521100591);
#9 - Foto di melanie m (www.flickr.com/photos/memsahib/521062460);
#10 - Foto di bill mulder (www.flickr.com/photos/bilbord99/2857948115);
#11 - Foto di melanie m (www.flickr.com/photos/memsahib/521097617);
#12 - Foto di melanie m (www.flickr.com/photos/memsahib/521095581);
#13 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7377315352);
#14 - Foto di thefinned1 (www.flickr.com/photos/thefinned1/2856960483).