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302 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced
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318 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced

455 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced

287 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced

378 pages first pub 1971 (editions) user-added

nonfiction nature science adventurous informative slow-paced

287 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced

297 pages first pub 1971 (editions)

nonfiction nature science adventurous informative slow-paced