Libros
Atoms vs. the screwworm
United States. Department of Agriculture. Office of Information1958
Género: Screwworm
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Providing the Secretary of Agriculture authority regarding the sale of sterile screwworms
United States. Congress. House. Committee on Agriculture
1990
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Eradication of screw-worms in Mexico
United States. Congress. Senate. Committee on Agriculture and Forestry. Subcommittee on Agricultural Research and General Legislation.
1966
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