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247 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

262 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

186 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

305 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

239 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

214 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

262 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced