1868-1952 1902-1984 adams americanphotographers ansel artistic artisticphotography bildband biographies biography canada canada(ouest) correspondance correspondence curtis edwards exhibitions fotografie histoire history indiansofnorthamerica indiensd'amérique juvenileliterature landscapephotography landscapes landschaftsphotographie nationalparksandreserves naturephotography ouvragesillustrés photographers photographie photographieartistique photography pictorialworks portraitphotography portraits postcards unitedstates universityofcalifornia(system) western winterinart états-unis