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193 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

319 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

278 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

296 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

7 hours, 56 minutes first pub 1988 (editions)

nonfiction science challenging informative slow-paced

262 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

180 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced