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missing page info first pub 2017 (editions)

nonfiction science technology challenging informative slow-paced
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240 pages first pub 2017 (editions)

nonfiction science technology challenging informative slow-paced

224 pages first pub 2017 (editions)

nonfiction science technology challenging informative slow-paced

5 hours, 45 minutes first pub 2017 (editions) user-added

nonfiction science technology challenging informative slow-paced