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century
20th century
decade
1970s
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Armstrong, Patricia K.
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English
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The Morton Arboretum Staff Publications and Dataset Collection
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collection:
The Morton Arboretum Records: Research
year:
1970
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Article
Parmelia substygia in Wisconsin
1970
Armstrong, Patricia K.
Article
Another ice age on the way?
June 1970
Armstrong, Patricia K.
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