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Book, 2018
Current format, Book, 2018, First edition., Available .
Book, 2018
Current format, Book, 2018, First edition., Available . Offered in 0 more formats
Ms. Frizzle takes the class on a camping trip, but Arnold is worried about monsters, and sets out to create a "Monster Scaring Perimeter" powered by a generator to keep the lights on--and in the process the class learns about sources of clean energy (and maybe monsters).
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