Harald Wertz' Contributions

ArtInfo–MusInfo (1971-1980) # 28, pages 45-53  

Impossible cristal

Lisp Bulletin (1978-1979) # 2, pages 31-38  

A System to Understand Incorrect Programs

VLISP (1973-1980) ATP4273, pages 54-70  

Stereotyped Program Debugging : an Aid for Novice Programmers