spaceman © dave calder 1995 spaceman original publication by hilltop press, isbn 0 905262 093 theorems of violence © dave calder 1984 theorems of violence original publication by otherpublications, isbn 0 946057 036 the walls © dave calder 1991 the walls original publication by otherpublications, isbn 0 946057 583 april and xii © dave calder 1973 april some collaborations with musicians etc-