7 Items

Please note that full-text search is only available for items which have successfully had their text extracted. Due to the nature of the materials, many documents are not OCR-compatible.

  • Subject is exactly "barrier zone"
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Slide of aerial photograph of Tuxtla Gutierrez

Creators: Agricultural Research Service, United States Department of Agriculture

Date: 1972

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Concentration of Laboratory Confirmed Screwworm Cases: United States-Mexico, Calendar Year 1975

Creators: Agricultural Research Service, United States Department of Agriculture

Date: 1975-01-01

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USDA-ARS Screwworm Research, Chiapa de Corzo, Mexico

Description: On back, "The Breeding Edge" ; from Paul T. Stanford items

Creators: Agricultural Research Service, United States Department of Agriculture

Date: ca. 1984

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Progress in Screwworm Eradication

Creators: Animal and Plant Health Inspection Service, United States Department of Agriculture

Date: 1976-07

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Screwworm Eradication: New Goal: Mexico

Creators: Animal and Plant Health Inspection Service, United States Department of Agriculture

Date: [ca. 1973]

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With Sterility Technique Screwworms Eradicated from U. S

Date: 1966-07

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With Sterility Technique Screwworms Eradicated from U. S

Date: 1966-07

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