• PowerPoint version
• Journal Article 
  Kuldip Kumar, Anita Thompson, Ashok K. Singh, Yogesh Chander and Satish C. Gupta. Enzyme-Linked Immunosorbent Assay for Ultratrace Determination of Antibiotics in Aqueous Samples. J. Environ. Qual. 33:250-256 (2004).
• Online abstract

Profitability of Organic Cropping Systems (PDF version of PPT, 164 kb)

• Journal article:
  Paul R. Mahoney, Kent D. Olson, Paul M. Porter, David R. Huggins, Catherine A. Perillo, and R. Kent Crookston. Profitability of Organic Cropping Systems in Southwestern Minnesota. Renewable Agriculture and Food Systems: 19(1); 35-46.

  Microbiological Survey of Fresh Produce (PDF of journal article, 150 kb)

• Journal article: 
  Avik Mukherjee, Dorinda Speh, Aaron T. Jones, Kathleen M. Buesing, and Francisco Diez-Gonzalez.  Longitudinal Microbiological Survey of Fresh Produce Grown by Farmers in the Upper Midwest.  Journal of Food Protection: Vol. 69, No. 8, pp. 1928-1936.

Coliform Bacteria in Organic and Conventional Produce (PDF version of PPT)

• Journal article:
  Avik Mukherjee, Dorinda Speh, Elizabeth Dyck, and Francisco Diez-Gonzalez. Preharvest Evaluation of Coliforms, Escherichia coli, Salmonella, and Escherichia coli 0157:H7 in Organic and Conventional Produce Grown by Minnesota Farmers. Journal of Food Protection: Vol. 67, No. 5, pp. 894-900.
• Online abstract