136.744 L Leopold, Werner F 1896- Speech development of a bilingual child ; a linguist ´ s record by Werner F . Leopold . Evanston and Chicago, Northwestern university, 1939-49 . 4 v . 23 cm . (Northwestern university studien in the humanities . no 6-11-18-19) Bibliography : v . 1, p . 185-188 . References : t . 2, p . 275-283 . - t . 3, p . 189-194 .- t . 4, p . 165 .