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Henry Ledgard

Professional Pascal: Essays in the Practice of Programming
Software Engineering Concepts
Elementary PASCAL: As Chronicled by John H. Watson
Elementary BASIC: As Chronicled by John H. Watson
Elementary BASIC
Elementary PASCAL: As Chronicled by John H. Watson
The World of Programming Languages (Springer Books on Professional Computing)
ADA An Introduction Ada Reference Manual (July 1980)
ADA® An Introduction
ADA®: An Introduction
Ada, an Introduction
ADA® An Introduction
The World of Programming Languages
Directions in Human Factors for Interactive Systems