00442nam a2200157Ia 4500003000900000008004100009040001600050080001900066100002800085245004800113260003800161300001500199650002700214650001900241650002400260IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a517.925.4bMAC  aMacduffee, Cyrus Colton 0aTheory of equationscCyrus Colton MacDuffee  aNew YorkbJohn Wiley & Sonsc1954  avii, 120p.  aDifferential equations  aNASA Thesaurus  aTheory of equations