PL/I Bulletin, Issue 6, March 1968

• Bemer, Robert W. (1968) Bemer, Robert W. "The PL/I Family Tree"
• Des Jardins, Paul R. (1968) Des Jardins, Paul R. "RUSH - An Interactive Dialect of PL/I"
• Glass, R. L. (1968) Glass, R. L. "SPLINTER--a PL/I interpreter emphasizing debugging capability" PL/I Bull. (Mar. 1968).