\input zb-basic
\input zb-ioport
\iteman{io-port 50146577}
\itemau{De Bosschere, Koenraad}
\itemti{An operator precedence parser for standard prolog text}
\itemso{Softw., Pract. Exper. 26, No. 7, 763-779 (1996).}
\itemcc{}
\itemut{}
\itemli{}
\end