MERRILL F. UNGER (A.B., Ph.D., Johns Hopkins University; Th.M., Th.D., Dallas Theological Seminary) pastored several churches before joining the faculty of Dallas Theological Seminary in 1948. There he served as professor of Old Testament studies until his retirement in 1967. He was the author of many books including such monumental reference works as Unger's Bible Dictionary, Unger's Bible Handbook, and the two-volume Unger's Commentary on the Old Testament.

R. K. HARRISON (1920-1993) (B.D., Th.M., Ph.D., University of London; D.D., Huron College, London, Ontario) was a professor at Wycliffe College, University of Toronto. He also served as a professor at Toronto School of Theology. He wrote, co-authored, and edited dozens of books including Numbers for the Wycliffe Exegetical Commentaries and Unger's Bible Dictionary.