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264 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced
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221 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

224 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

5 hours, 47 minutes first pub 1988 (editions)

nonfiction science challenging informative slow-paced

7 hours, 18 minutes first pub 1988 (editions)

nonfiction science challenging informative slow-paced

272 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

194 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

228 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

265 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced