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Clarence Godshalk with Webster Crowley studying Dutch Elm Disease (3.3539)
Date: 1950sType: Photographic image
Description:Clarence Godshalk with Webster Crowley studying Dutch Elm Disease
Extent: 1 photograph
Clarence Godshalk with Webster Crowley studying Dutch Elm Disease (3.3798)
Date: 1950sType: Photographic image
Description:Clarence Godshalk with Webster Crowley studying Dutch Elm Disease
Extent: 1 photograph
Clarence Godshalk examining Dutch Elm Disease symptoms (3.3799)
Date: 1950sType: Photographic image
Description:Clarence Godshalk examining Dutch Elm Disease symptoms
Extent: 1 photograph