\input zb-basic
\input zb-ioport
\iteman{io-port 70116458}
\itemau{Scheepers, Ferdi}
\itemti{Landscape visualisation}
\itemso{Afrigraph, 49-52 (2001).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/513867.513879}
\end