Pennsylvania. Department of Transportation. Office of Research and Special Studies
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Sources
found: nuc89-34605: Staplin, L. K. Ocular discomfort, musculoskeletal difficulties, and physiological effects of long-term video display terminal usage, 1986(hdg. on CU rept.: Pennsylvania. Dept. of Transportation. Office of Research and Special Studies; usage: Pennsylvania Dept. of Transportation, Office of Research and Special Studies)
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Change Notes
1989-04-03: new
2013-03-12: revised
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