annotazioni, fonti e crediti per i fotografi
(le cui foto sono pubblicate ciascuna sotto la relativa licenza Creative Commons)
#1 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4285075054);
#2 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3982645259);
#3 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/4153751179);
#4 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3978936505);
#5 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4321916790);
#6 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4415641246);
#7 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3992699448);
#8 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/4041626026);
#9 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4354467959);
#10 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3992701624);
#11 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3991942957);
#12 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3991940581);
#13 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4261618734);
#14 - Foto di McMillan & Gage (www.flickr.com/photos/mcmillangage/4544285543);
#15 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/4191161109);
#16 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/3991944827);
#17 - Foto di McMillan & Gage (www.flickr.com/photos/h-studios/4107246975).