Persons connected with research density meter calibration research at the University of Kentucky watch a demonstration of one of the nuclear instruments; Kneeling from left: J. C. Cobb, Bureau of Public Roads; J. R. Harbinson, Kentucky Department of Highways; Professor L. C. Pendley, University of Kentucky Department of Civil Engineering; Standing from left: Professor David Blythe, Head of the University of Kentucky Civil Engineering Department; Professor R. E. Puckett, University of Kentucky Electrical Engineering Department; R. C. Dean, Highway Laboratory; and D. M. Burgess, Kentucky Department of Highways
University of Kentucky.
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