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592 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced
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269 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

282 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

703 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

272 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

263 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

629 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

290 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

320 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

288 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced

594 pages first pub 1993 (editions)

nonfiction science adventurous challenging informative medium-paced