1905-1990 1937- 20thcentury 921 academic adams americanphotographers ansel artistic artisticphotography benguerel bildband biographies biography british california cambridge catalanfiction catalanlanguage catalonia censorship colorphotography correspondance correspondence correspondenceadams dirac eccentric enigma enigmatic espionage espriu exhibitions genius greatbritain groundbreaking history historyandcriticism inart indiansofnorthamerica influential intellectual joan juanarbó juvenileliterature landscapephotography landscapes landschaftsphotographie lane languagepolicy mathematician mysterious nationalparksandreserves naturephotography nobel-prize nuclearreactions particles(nuclearphysics) photographcollectionspacifictelesisgroup photographers photographes photographie photographieartistique photographiedelanature photography photographyofmountains physicists physics pictorialworks politicalaspects politicsandgovernment politicsandliterature portraitphotography postcards quantum-field-theory quantum-mechanics quantumtheory relativity(physics) robert sales salvador sammlung scientific-revolution sebastià shumovsky soviet sovietunion spain spies stanislav theoretical-physics unconventional unitedstates universityofcalifornia(system) williamh winterinart xavier yosemitenationalpark