Allen, J.P.B. Testing and experimental methods. - London : University Press, 1977. - 233 p. : il. 23 cm - The edinburgh course in applied linguistics . BibliografĂa en p.224-226. ISBN: 0194371255 Subjects--Topical Terms: InglĂ©s Index Terms--Genre/Form: Libro Universal Decimal Class. No.: 802.0-07