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Northwestern University humanities series


1	v. 6 . Speech development of a bilingual child : a linguist's record / by Werner F. Leopold ; v. 1 Vocabulary growth in the first two years / by Werner F. Leopold New York : AMS Press , 1970, c1939
2	v. 11 . Speech development of a bilingual child : a linguist's record / by Werner F. Leopold ; v. 2 Sound-learning in the first two years / by Werner F. Leopold New York : AMS Press , 1970, c1947
3	v. 18 . Speech development of a bilingual child : a linguist's record / by Werner F. Leopold ; v. 3 Grammar and general problems in the first two years / by Werner F. Leopold New York : AMS Press , 1970, c1949
4	v. 19 . Speech development of a bilingual child : a linguist's record / by Werner F. Leopold ; v. 4 Diary from age 2 / by Werner F. Leopold New York : AMS Press , 1970, c1949