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Gellir lawrlwytho cynnwys at ddefnydd anfasnachol, megis defnydd personol neu ar gyfer adnoddau addysgol.
Ar gyfer defnydd masnachol cysyllwch yn uniongyrchol gyda deilydd yr hawlfraint os gwelwch yn dda.
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Disgrifiad

CH.2010.2 - Eleanor and Georgiana Ormerod were sisters. They published many informative texts on insect pests at a time when women rarely worked in science. Georgiana illustrated, while Eleanor carried out the research. In 1881, they published the “Manual of Injurious Insects.” Over 170,000 copies of their pamphlet on the warble fly were printed.

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