TThe Happy Trio reading schemeThe Happy Trio reading schemede William S. GrayMateriasReaders (Elementary)Ediciones (1)The Happy Trio reading scheme (1956)Wheaton of Exeter · inglésMás obras de William S. GrayOOn their own in readingOn their own in readingWWhat makes a book readableWhat makes a book readableOOn their own in readingOn their own in reading
WWhat makes a book readable, with special reference to adultsWhat makes a book readable, with special reference to adults of limited reading ability1935