The Hebrew lexicon is Brown, Driver, Briggs, Gesenius Lexicon; this is keyed to the "Theological Word Book of the Old Testament." These files are considered public domain.
Brown, Driver, Briggs and Gesenius. "Hebrew Lexicon entry for Mikmac (Ezra 2:27, Neh. 7:31)". "The NAS Old Testament Hebrew Lexicon".