00461cam a22001217a 4500008004000000082001500040245010000055260003000155300001400185700003500199999001900234952008600253180718b1958   xxu||||| |||| 00| 0 eng d  aT19x73 R59  aThe challenge to America : its economic and social aspectscby Rockefeller Brother Fund, U.S.A.  aNew YorkbDoubledayc1958  aviii,78p.  aU.S.A.Rockefeller Brother Fund  c437232d437232  00104070aIIPAbIIPAd2010-03-19oT19x73 R59p21308r2018-07-21w2018-07-21yBK