Hetty Orrilla Ballard
American geologist
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| Intro | American geologist | |||
| Places | United States of America | |||
| was | Geologist | |||
| Work field | Science | |||
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| Birth | 18 June 1868, Boston, USA | |||
| Death | 20 December 1897Colorado Springs, USA (aged 29 years) | |||
| Star sign | Gemini | |||
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