Ladders Reading/Language Arts 3: Onward! (one-below; Social Studies) (Ladders Common Core Readers)
National Geographic Learning(Author)
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ISBN:9780736292894
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阅读年龄:阅读年龄 7-8岁 (25.0%), 9-10岁 (25.0%)
A collection of articles linked together by the topic of exploring Antarctica