00532nam a2200157Ia 4500008003900000020001500039035001700054082001600071100002200087245012100109260005100230300001100281650002700292650003800319700001700357770711s1999 nyu a a eng a052146742X a(Sirsi) 137004a428 bR42i310aRichards, Jack C.10aInterchange intro english for international communication :bintro teacher's manual /cJack C. Richards, Chuck Sandy aNew York :bCambridge University Press,c1999. a160 p. 4aInglés xEnseñanza 4aInglés xProblemas, ejercicios.1 aSandy, Chuck