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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 &#x2014; Volume 1</subfield>
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    <subfield code="a">Salt Lake City, UT :</subfield>
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    <subfield code="c">2001</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">Release date is 2001-10-01</subfield>
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    <subfield code="a">This etext was prepared by Sue Asscher</subfield>
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    <subfield code="a">"The Variation of Animals and Plants under Domestication &#x2014; Volume 1" by Charles Darwin is a scientific work published in January 1868. This extensive 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 book also introduces his controversial theory of heredity called pangenesis. Written over four years of intense labor, this work represents Darwin's attempt to provide the factual foundation promised in "On the Origin of Species," though he privately worried about its reception. (This is an automatically generated summary.)</subfield>
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    <subfield code="a">Variation (Biology)</subfield>
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    <subfield code="a">Domestic animals</subfield>
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    <subfield code="a">Plants, Cultivated</subfield>
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    <subfield code="u">https://www.gutenberg.org/ebooks/2871</subfield>
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