Pleasure in English. A graded course in English language in five stages, etc. (The O livel stage [and] stage five ... / 
Yglesias, John Roy Charles.
Hughes, Gwilym Fielden.
Newham, I. M.
Mclaren, M. C.
London, 
1965-1968.
Joint authors: John Roy Charles Yglesias and Gwilym Fielden Hughes.