| 1 |
Let's go ahead / Arthur I. Gates , Jean Y. Ayer ; [design and illustrations by Cyrus LeRoy Baldridge...[et al.]
New York : Macmillan , 1940
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| 2 |
Let's look around / Arthur I. Gates and Jean Y. Ayer ; [design and illustrations by Cyrus LeRoy Baldridge ... et al.]
New York : Macmillan , 1940
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| 3 |
Let's travel on / Arthur I. Gates and Jean Y. Ayer ; Design and illustrations by Cyrus LeRoy Baldridge ... [et al.]
New York : Macmillan , 1940
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| 4 |
Manual for Let's travel on / by Arthur I. Gates and Jean Ayer ; with the assistance of Mary M. Bartlett
New York : Macmillan , 1941
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| 5 |
Manual for Let's go ahead / by Arthur I. Gates and Jean Ayer ; with the assistance of Mary M. Bartlett
New York : Macmillan , 1941
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