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The Engineer of Beaver Brook
出版Milton Bradley Company, 1925
URLhttp://books.google.com.hk/books?id=wcpr-e8IzkQC&hl=&source=gbs_api
註釋The adventure of young beavers in the backwoods of Idaho. They had to contend with otters and coyotes, and the pond where they established their homestead. The clever little engineers dammed a mountain meadow, dredged a canal to make logging easier, built a house, and learned to withstand drought and water-slide, and other natural forces.