Insecticide residue in milk, 1950s and 1960s , NE-36 reports, Birdsfoot trefoil experiments, 1950s, 1960s

Files on graduate students and undergraduate advisees; general correspondence and subject files relating to entomology; research and conference notes and reports, files on insect control research and recommendations, and extension newsletters. Includes photographs of people and projects in Gyrisco's career.