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160 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced
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170 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

153 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

150 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

148 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1996 (editions)

nonfiction science challenging informative slow-paced

176 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

141 pages first pub 1996 (editions) user-added

nonfiction science challenging informative slow-paced

176 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

96 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

170 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced