00270nam a2200109Ia 4500008004100000082001900041100001700060245003200077250000900109260003400118300000800152240913s9999||||xx |||||||||||||| ||und||  a306.362  WAL/A  aJames Walvin 2aA Short History odf slavery  aNULL  bPenguin BooksaNew Yorkc2007  a258