His The computer programmer's dictionary and handbook, 1968.

His Understanding computers, c1988: CIP t.p. (Donald D. Spencer) data sheet (b. 3/28/31)

His Computer dictionary, c1991: CIP t.p. (Donald D. Spencer) data sheet (Donald Dean Spencer, b. 03-28-31)

His Greetings from Florida, c2000: CIP t.p. (Donald D. Spencer) data sheet (Donald Dean Spencer; b. Mar. 28, 1931)

Information from 678 converted Jan. 5, 2015 (Abacus Computer Corp., Daytona Beach, Fla.; b. 1931)