TY  - BOOK
AU  - Chang,S.K.(Shi Kuo),1944-.
TI  - Principles of visual programming systems
SN  - 013710765X
PY  - 1990///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Visual programming (Computer science)
N1  - Includes bibliographies and index
ER  -