Quellen- und Fotonachweise

Holger Martens - 3art.de, Thomas Krüger - kansho.de

Pixelio.de: Marcus Stark, birgitH, Andre Müller, Jeger, Rike, Marc Wolf, Peter von Beche, Wandersmann, Uschi Dreiucker, Manwalk, Meyhome, Karl-Heinz Gottschalk(goka), S.Hofschlaeger, S.Hainz, uschi-dreiucker, HeiFisch, Peter Freitag, Simone Hainz

Fotolia.com: M.Rosenwirth, kmit, Valua Vitaly, Monkey Business, sp-v, iQoncept, Blacky, Doc RaBe, Werner Dreblow, GoodMood Photo, Kannebecker, Patrick Hermans, Fotofreundin, Denis Fonchikov, Andre, volkerr, Hallgerd , DWP, Vladimir Mucibabic, THesIMPLIFY, frank peters, lumen-digital, highspeedfotosde , G.Light, babimu, babimu, Reflekcija, pixelplot, lagom, Picture-Factory , WoGi , G.G. Lattek , Werner Heiber , Natis, contrastwerkstatt, contrastwerkstatt, contrastwerkstatt, Jacek Chabraszewski, senoldo , monticellllo , Uwe Annas, mittelgrau, kk-artworks, Benicce, rus09, olly, N-Media-Images, Stauke, Andy Grimm, P. Teeraphatsakool, Nici Heuke