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142 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced
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94 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

86 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

126 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

68 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

42 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

66 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

missing duration info first pub 1919 (editions)

nonfiction autobiography science informative medium-paced

70 pages first pub 1919 (editions)

nonfiction autobiography science informative medium-paced