PPeople and progressPeople and progressde William S. Gray, May Hill ArbuthnotMateriasReaders (Elementary)ReadersEdiciones (1)People and progress (1943)Scott, Foresman · 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