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century
20th century
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1940s
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1940
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1949
and 3 more
people, organizations and landmarks
Watts, May Theilgaard
language
English
collection
Collection of May Theilgaard Watts materials
Subject/Keyword
Crataegus L. (hawthorn)
Drawings -- United States -- 20th century
Fungi--Spores
Fungi--Spores--Morphology
Juniperus virginiana L. (eastern red-cedar)
Leaves--Diseases and pests--Biological control
Pen works -- United States -- 20th century
Trees--Diseases and pests
Twigs
Wood-decaying fungi
and 3 more
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Drawing
Cedar Apple Rust: Late Summer To Fall
1940s
Watts, May Theilgaard
Drawing
Cedar Apple Rust: Early Summer
1940s
Watts, May Theilgaard
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