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298 pages first pub 1983 (editions)

nonfiction education informative medium-paced
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231 pages first pub 1983 (editions)

nonfiction education informative medium-paced

missing duration info first pub 1983 (editions)

nonfiction education informative medium-paced

244 pages first pub 1983 (editions)

nonfiction education informative medium-paced

242 pages first pub 1983 (editions)

nonfiction education informative medium-paced