Language laboratory facilities : technical guide for their selection, purchase, use, and maintenance / [by] A. S. Hayes. Hayes, Alfred S. Electronic Industries Association. United States. Office of Education. Language laboratories. PB36 .H3 1968 407 HAL "The U.S. Office of Education initiated a contract with the Electronic Industries Association for the preparation of this" volume. Bibliography: p. [119]-138. London : Oxford U.P., 1968. 1968. 1968 Text xii, 138 p. : eng Language and language learning ; 16