@enigma Kenne ich nicht, aber spannend…
#ThroughTheRabbitHole :: #ChronoRecherce ::
by Bern Porter 1939, https://oac.cdlib.org/findaid/ark:/13030/ft0t1n97c1/
https://digital.library.ucla.edu/catalog?f%5Bmember_of_collections_ssim%5D%5B%5D=Porter+%28Bern%29+Papers.+Collection+639&sort=title_alpha_numeric_ssort+asc&view=gallery
https://en.wikipedia.org/wiki/Bern_Porter
https://www.moma.org/interactives/exhibitions/2010/lostandfound/
uncropped map: https://dabacon.org/pontiff/wp-content/uploads/2012/08/1939-Map-of-Physics-H2.jpg