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1. Professors examining vials filled with fungus cultures Professors examining vials filled with fungus cultures Purdue University--Faculty;Laboratories;Botany Dr. John L. Tuite, associate professor of plant Pathology and Rodney W. Caldwell (MS 69) are busy examining glass vials filled with fungus cultures that cause damage to the food grains such as corn. April...

2. Dr. Landgrebe and others consulting a map Dr. Landgrebe and others consulting a map Purdue University--Faculty; Maps Dr. Landgrebe (?) (l.), School of Electrical Engineering. Dr. Christian J. Johannsen (r.) an agronomist, and Robert B. MacDonald, technical director (far left). Feb. 1970

3. Durward L. Allen, speaking at microphone Durward L. Allen, speaking at microphone Purdue University--Faculty;Ecology;Microphones Durward L. Allen, professor of Wildlife & Ecology, 1970 alumnus

4. Ronald Barr, working in laboratory Ronald Barr, working in laboratory Purdue University--Faculty;Engineers; Laboratories Ronald Barr, 1970 Alumnus
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