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by National Geographic LearningPaperback 
 
 
 
 
 
 ISBN: 978-1-285-35904-5 ISBN-10: 1-285-35904-6 National Geographic School Pub · 2013  | 
| See also: | ||
| 2013 | Paperback | Ladders Science 4: The Chesapeake Bay (on-level) | 
| 2013 | Paperback | Ladders Science 4: The Chesapeake Bay (above-level) |