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366 pages first pub 1968 (editions)

nonfiction informative medium-paced
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378 pages first pub 1968 (editions)

nonfiction informative medium-paced

384 pages first pub 1968 (editions)

nonfiction informative medium-paced

380 pages first pub 1968 (editions)

nonfiction informative medium-paced

317 pages first pub 1968 (editions)

nonfiction informative medium-paced

408 pages first pub 1968 (editions)

nonfiction informative medium-paced

380 pages first pub 1968 (editions)

nonfiction informative medium-paced

396 pages first pub 1968 (editions)

nonfiction informative medium-paced

240 pages first pub 1968 (editions)

nonfiction informative medium-paced

368 pages first pub 1968 (editions)

nonfiction informative medium-paced

240 pages first pub 1981 (editions)

nonfiction informative medium-paced