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@N06/4694769830);
#2 - Foto di Dennis Hill (www.flickr.com/photos/fontplaydotcom/3502409011);
#3 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/5941291209);
#4 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7305773400);
#5 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/6505067835);
#6 - Foto di Melanie M (www.flickr.com/photos/memsahib/521068596);
#7 - Foto di Russ Ferriday (www.flickr.com/photos/ferriday/3918857796);
#8 - Foto di Russ Ferriday (www.flickr.com/photos/ferriday/3918077731);
#9 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/6834915776);
#10 - Foto di Russ Ferriday (www.flickr.com/photos/ferriday/3915105010);
#11 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7321765202);
#12 - Foto di Bill Mulder (www.flickr.com/photos/bilbord99/2857952191);
#13 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/4658659218);
#14 - Foto di Bev Sykes (www.flickr.com/photos/basykes/2524275227);
#15 - Foto di Damian Gadal (www.flickr.com/photos/23024164@N06/7167969569);
#16 - Foto di Steve Corey (www.flickr.com/photos/stevecorey/2859581571);
#17 - Foto di Craig Moe (www.flickr.com/photos/60445767@N00/677050638).