How to build a simulation game : proceedings of the 10th ISAGA conference, 8-11 August 1979, Leeuwarden, the Netherlands. Vol. 2, 43-88 STARTPAGE=43;ENDPAGE=88;TITLE=How to build a simulation game : proceedings of the 10th ISAGA conference, 8-11 August 1979, Leeuwarden, the Netherlands. Vol. 2