[ACM] CACM 12(09) (September 1969)

(1957) Communications of the ACM  

Hansen, Wilfred J. (1969) Hansen, Wilfred J. "Compact list representation: definition, garbage collection, and system implementation" pp499-507 Orgass, Richard J.; Waite, William M. (1969) Orgass, Richard J.; Waite, William M. "A base for a mobile programming system"