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262 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

278 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

203 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

215 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

188 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

216 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced