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212 pages first pub 1988 (editions) user-added

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

nonfiction science challenging informative slow-paced

6 hours, 57 minutes first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

211 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

171 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

241 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

167 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

288 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

309 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced