Woglum, R. S. (Russell Sage). Fumigation of Citrus Trees for Control of Insect Pests., book, July 1923; (https://digital.library.unt.edu/ark:/67531/metadc5935/m1/1/: accessed March 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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