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by Barker, Conrad Robert; Smith, William
by Robert Barker, William Smith Conrad
by Barker, William H.; Sinclair, Cecilia
by Link, William; Barker, Richard
by Barker, William L.
by Barker, William C.; Barker, Elaine; U.s. Department of Commerce; et al.
by National Institute of Standards and Technology, U.s. Department of Commerce; Barker, William C.; Ferraiolo, Hildegard
by U.s. Department of Commerce; Barker, Elaine; Barker, William; et al.
by Barker, William H.
by Barker, Elaine; Barker, William; Burr, William; et al.