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248 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

201 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

256 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

301 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

182 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

161 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

211 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

192 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced