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236 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

296 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

251 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

256 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

236 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

217 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

256 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

240 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced