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Creator Personal Names
Duncan, Ira Jeriah, 1906-
Remove constraint Creator Personal Names: Duncan, Ira Jeriah, 1906-
Creator Personal Names
Dustman, Robert B. (Robert Barclay), 1892-
Remove constraint Creator Personal Names: Dustman, Robert B. (Robert Barclay), 1892-
All Subjects
Spraying and dusting in agriculture.
Remove constraint All Subjects: Spraying and dusting in agriculture.
Subject Topical
Apples.
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Subject Topical
Thiocyanates.
Remove constraint Subject Topical: Thiocyanates.
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