Jacob H. A planned auxiliary language

London: Dennis Dobson Limited; Birmingham: Whitehill (Printers) Limited, 1947. — 160 p.Part one. General review of the chief language systems: esperanto, linguo internationa di la delegitaro, occidental, novial, interlingua or latino sine flexione. Part two. Structural problems of the planned language. Part three: present day movements for a planned language. A complete statement of the whole problem.
Uma discussao completa do problema da construcao de linguas auxiliares.