00378    a2200133   4500082002100000100002000021245007800041260004300119300002300162650001200185650001800197650001300215650001600228  a380.1440973bSPE  aSpears, John R.  aThe American slave tradeban account of its origin,growth and suppression  aNew YorkbBallantine booksc1960g1960  aviii, 158p.c18cm.  aSLAVERY  aUNITED STATES  aCOMMERCE  aSLAVE TRADE