00571nam a2200157Ia 4500003000900000008004100009040001600050080001600066100002300082245016200105260003500267300001500302490005000317650002700367650001900394IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a517.91bERU  aErugin, Nikolay P. 0aLinear systems of ordinary differential equationsbwith periodic and quasi-periodic coeffecientscNikolay P. Erugin                                            aNew YorkbAcademic Pressc1966  axxi, 271p.  aMathematics in science and engineering; v. 28  aDifferential equations  aNASA Thesaurus