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222 pages first pub 2009 (editions)

nonfiction philosophy reference science informative medium-paced
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160 pages first pub 2009 (editions)

nonfiction philosophy reference science informative medium-paced

160 pages first pub 2009 (editions)

nonfiction philosophy reference science informative medium-paced

160 pages first pub 2009 (editions) user-added

nonfiction philosophy reference science informative medium-paced