BGMI Mail Entry Free For All Trial Site David Ralph Knibbs 1953- Number of Source Citations:1 Who's Who in Science and Engineering. Second edition, 1994-1995. New Providence, NJ: Marquis Who's Who, 1994. [WhoScEn 2] Source Citation: Biography and Genealogy Master Index. Farmington Hills, Mich.: Gale Group, 1980-2001.