00310nam a2200121Ia 4500008004100000040001600041041001200057082001700069100002500086245002600111260004000137300001100177230917s9999||||xx |||||||||||||| ||und||  e69023aMAIN  aEnglish  a301.24 H363F  aHeilbroner, Robert L 4aThe future as history  aNew YorkbHarper and Brothersc1960  a217 p.