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Elmer Ralph De Ong
Entomologist
Wikidata
Source:
Wikidata
On this page
On this page
Works from the collections
Works from the collections
2 works
Books
Insect, fungus and weed control / by E.R. de Ong.
Elmer Ralph De Ong
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Date: 1953
Books
Chemistry and uses of pesticides / [Elmer Ralph De Ong].
Elmer Ralph De Ong
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Date: [1956]
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