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192 pages first pub 1996 (editions)

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

nonfiction science challenging informative slow-paced

160 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

152 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

176 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1996 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1996 (editions)

nonfiction science challenging informative slow-paced

208 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

191 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

144 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1996 (editions)

nonfiction science challenging informative slow-paced