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    <subfield code="a">Darwin, Charles,</subfield>
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    <subfield code="a">The Variation of Animals and Plants Under Domestication, Volume II (of 2)</subfield>
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    <subfield code="a">Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Variation_of_Animals_and_Plants_Under_Domestication</subfield>
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    <subfield code="a">"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin is a scientific work published in 1868. This comprehensive study examines how animals and plants change through selective breeding and domestication. Darwin presents detailed observations from years of experiments and correspondence with breeders worldwide. The work also introduces his theory of heredity called pangenesis, attempting to explain how traits pass from parents to offspring. This massive undertaking represents over four years of intensive labor, laying groundwork for Darwin's later explorations of human evolution and emotional expression. (This is an automatically generated summary.)</subfield>
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