TY  - BOOK
AU  - Wirth Niklaus
TI  - Systematic programming: An introduction
T2  - Prentice-Hall series in automatic computation
U1  - B2893P0bD65,8(B), L32;1 
PY  - 1973///
CY  - New Jersey
PB  -  Prentice Hall       
KW  - programming
ER  -