00287nam a2200121Ia 4500082002000000100002300020245002900043260003700072300002300109500002300132500000500155700000500160  a515.35bM666.NO  aMinorsky, Nicholas  aNonlinear oscillationsb  aNew DelhibEast West Pressc1969  axviii, 714p. Index  a"An East-West ed."  a  a