00386nam a2200145   450000100060000000300030000600500170000900800410002603500190006703500180008605000200010410000220012424500670014626000270021336160UR20220427193817.0061105|||||||||||||||||||||||||||||||| d  a(janium) 36149  a(janium)36147 4aHD82b.H33 19621 aHagen, Everett E.10aTheory of social change, on theb : how economic growth begins  bThe Dorsey Pressc1962