Wirth, Niklaus Systematic programming an introduction / Niklaus Wirth - Englewood Cliffs, N.J. : Prentice - Hall , 1973 - xiv, 167p. : ill. ; 24 cm. Includes index ISBN: 0138803692 Subjects--Topical Terms: Computadoras digitales electrónicas--- Programación LC Class. No.: QA 76.6 / W57