Allen, John Patrick Bierley 1936- English in physical science / J.P.B. Allen, H.G. Widdowson - Oxford : Oxford University Press, c1974 - x, 104 p. : gráfs., tablas ; 23 cm. - English in focus . Problemas y ejercicios ISBN: 0194375102 (Studentīs Book) Subjects--Topical Terms: GRAMATICASLENGUA INGLESAFISICA Universal Decimal Class. No.: 001.9:53