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20th century
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1950s
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1950
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people, organizations and landmarks
Crowley Jr., Webster R.
Godshalk, Clarence E.
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The Morton Arboretum Records
Subject/Keyword
Arboretum Staff
Dutch elm disease
Research and scientific studies
Trees--Diseases and pests
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Subject/Keyword:
Trees--Diseases and pests
Subject/Keyword:
Arboretum Staff
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Photographic image
Clarence Godshalk with Webster Crowley studying Dutch Elm Disease
1950s
Photographic image
Clarence Godshalk with Webster Crowley studying Dutch Elm Disease
1950s
Photographic image
Clarence Godshalk examining Dutch Elm Disease symptoms
1950s
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