00369nam a2200133Ia 4500082002000000100002400020245002400044250000900068260005400077300002800131490006600159500000500225700000500230  a515.35bB619.DS  aBirkhoff, George D.  aDynamical systemsb  aRev.  aRhode IslandbAmerican Mathematical Societyc1966  axii, 305p. Index, Bibl.  aAmerican Mathematical Society Colloquium Publications v v. 9  a  a