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228 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

218 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

291 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

253 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

116 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

496 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced