Title: Learning independently: A directory of self-instruction resources, including correspondence courses, programmed learning products, audio cassettes, ... as books intended for non-formal education
Subjects: Aides audiovisuelles, Audio-visual aids, Catalogs, Self-culture, Catalogues, Repertoires, Directories, Correspondence schools and courses, Enseignement programme, Cours par correspondance, Culture personnelle, Education non-formelle, Programmed instruction, Non-formal education