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223 pages first pub 1997 (editions)

nonfiction science informative slow-paced
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240 pages first pub 1997 (editions)

nonfiction science informative slow-paced

288 pages first pub 1997 (editions)

nonfiction science informative slow-paced

8 hours, 23 minutes first pub 1997 (editions)

nonfiction science informative slow-paced

168 pages first pub 1997 (editions)

nonfiction science informative slow-paced

282 pages first pub 1997 (editions)

nonfiction science informative slow-paced

271 pages first pub 1997 (editions)

nonfiction science informative slow-paced

368 pages first pub 1997 (editions)

nonfiction science informative slow-paced