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Cover for 9781499420036 Cover for 9781499420050 Cover for 9781433921551 Cover for 9781433919565
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Paperback:

9781499420036 | Reprint edition (Powerkids Pr, August 15, 2016), cover price $11.75

Library:

9781499420050 | Powerkids Pr, August 15, 2016, cover price $26.25

cover image for 9781433919565
Product Description: How can we keep our drinking water pure? Whats the best way to dispose of our waste? How can we limit pollution? Answering these questions is the job of environmental engineers. Using the latest technology and research, environmental engineers are changing our world...read more

Paperback:

9781433921551 | Gareth Stevens Pub Hi-Lo Must reads, July 1, 2009, cover price $10.50 | About this edition: How can we keep our drinking water pure?

Library:

9781433919565 | Gareth Stevens Pub Hi-Lo Must reads, August 15, 2009, cover price $26.00 | About this edition: How can we keep our drinking water pure?

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