%0 Book Section %B Expert systems: the user interfaceExpert systems: the user interface %D 1987 %T Direct manipulation user interfaces for expert systems %A Baroff,J. %A Simon,R. %A Gilman,F. %A Shneiderman, Ben %B Expert systems: the user interfaceExpert systems: the user interface %P 99 - 125 %8 1987/// %G eng