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182 pages first pub 1980 (editions)

nonfiction informative medium-paced
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208 pages first pub 1980 (editions)

nonfiction informative medium-paced

208 pages first pub 1980 (editions)

nonfiction informative medium-paced

216 pages first pub 1980 (editions)

nonfiction informative medium-paced

182 pages first pub 1980 (editions)

nonfiction informative medium-paced