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216 pages first pub 1988 (editions)

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

nonfiction science challenging informative slow-paced

221 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

248 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing page info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

278 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

245 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

166 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced

missing duration info first pub 1988 (editions)

nonfiction science challenging informative slow-paced

212 pages first pub 1988 (editions)

nonfiction science challenging informative slow-paced