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224 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

272 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

272 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

220 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

198 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

211 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

192 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

271 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

221 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced