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7 hours, 56 minutes first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

266 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

152 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

256 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

247 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

208 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced