TY  - BOOK
AU  - 
AU  - Chang, Shi-Kuo, Ed.
TI  - Principles of visual programming systems
SN  - 013710765X
U1  - 001.642 
PY  - 1990///
CY  - Englewood Cliffs, New Jersey
PB  - Prentice Hall
KW  - Visual Programming (Computer Science)
ER  -