• redd.it/c3lwjo

“Dewey Decimal: 940s Europe; 950s Asia; 960s Africa; 970s North America; 980s South America; 990s Oceania, Antarctica, and Outer Space

Library of Congress: DA British Isles; DB Central Alps; DC France; DD Germany; DE Greco-Roman world (not pictured); DF Greece; DG Italy; DH Belgium and Luxembourg; DJ Netherlands; DK Russia, former Soviet states; DL Northern Europe and Scandinavia; DP Spain and Portugal; DQ Switzerland; DR Balkans and Turkey; DS Asia; DT Africa; DU Oceania; E/F Americas”–PeterVexillographer