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173 pages first pub 1988 (editions) user-added

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

nonfiction science challenging informative slow-paced

217 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

218 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

145 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

182 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

151 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced

185 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

173 pages first pub 1988 (editions) user-added

nonfiction science challenging informative slow-paced