The social problems of migrant farm laborers; effect of migrant farm labor on the education of children von Brooks, Melvin S

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Experimental Evaluation of an Airborne Illumination System von Hilgendorf, Robert L.

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Visual Performance with Simulated Flare Light: Effects of Flare-Ignition Altitude von Hilgendorf, Robert L.

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Detection and Recognition of Colored Signal Lights von Reynolds, Richard E., White, Raymond M., Hilgendorf, Robert L.

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Effects of Instructions on Wiring Task Accomplishment von Hilgendorf, Robert L., Ahlborn, John F.

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Effect of Lens Color on Target Visibility for Air-Sea Rescue von Hilgendorf, Robert L., MacLeod, Shelton

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Air-to-Ground Target Acquisition with Flare Illumination von Hilgendorf, Robert L

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VISUAL SEARCH AND DETECTION UNDER SIMULATED FLARELIGHT: PART II. EVALUATION OF A 5,000,000 CANDLEPOWER (C-P) SOURCE von Hilgendorf,Robert L

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Richard L. Van Horn, "Automatic Data-Processing Systems" (Book Review) von Hilgendorf, Robert L

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Automatic Data-Processing Systems von Robert L. Hilgendorf

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Robert H. Gregory, "Automatic Data-Processing Systems" (Book Review) von Hilgendorf, Robert L

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SEEKVAL Project IA1: Effects of Target Number and Clutter on Dynamic Target Acquisition von Hilgendorf ,Robert L, Milenski,John

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SEEKVAL Project IA1: Effects of Color and Brightness Contrast on Target Acquisition von Hilgendorf, Robert L, Milenski, John

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SEEKVAL Project IA1: Effects of Target Number and Clutter on Static Target Acquisition von Hilgendorf,Robert L, Milenski,John

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Trim plate for panelboards and switchboards von CAGGIANO ROBERT J, HILGENDORF ROBERT L, BARBER EDWARD G, CRAFT HAMON L, LAFOND MIKE P

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The Effect of Muzzle Flashes on Air-To-Ground Target Acquisition von Hilgendorf, Robert L, Erickson, Ronald A

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Flare Range Estimation: Evaluation of Aids von Hilgendorf,Robert L, Simons,John C

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The Effect of Simulated Sun Angle on Air-to-Ground Target Acquisition von Freitag,Melvin, Hilgendorf,Robert L, Searle,Robert G

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The Effect of Hovering Flares on Visual Target Acquisition von Hilgendorf, Robert L, Searle, Robert G, Erickson, Ronald A

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VISUAL PERFORMANCE WITH SIMULATED FLARELIGHT IN ARTIFICIAL CLOUDS von Katz, Sidney, Ase, Paul K, Raisen, Elliot, Hilgendorf, Robert L

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