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            "text": "Title: Karyological studies in four species of Annonaceae, a primitive angiosperm. (Annona cherimola, Annona muricata, Uvaria chamea, Asimina triloba)\nSource: J-Sci-Hir-Univ, Ser-B, Div-2-Bot, Dec 1972, 14 (2): 85-105. Ref."
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            "text": "Source: Acta-hortic. Wageningen: International Society for Horticultural Science. Nov. 1993. (344) p. 538-543.",
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            "text": "Author: Walker, J.W.",
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