Intermediate problem solving and data structures :
Helman, Paul
Intermediate problem solving and data structures : walls and mirrors / Paul Helman, Robert Veroff. - Menlo Park, California [ect.] : Benjamin Cummings, 1986.
Intermediate problem solving and data structures : walls and mirrors / Paul Helman, Robert Veroff. - Menlo Park, California [ect.] : Benjamin Cummings, 1986.