Practical training in thinking / [conceived and written by] Snejanka Mihaylova ; [ed. and designed by Philip Baber ; transl. from the Italian by Lindy Baker and Glenn Hayes]Acoustic thought / Snejanka Mihaylova ; Score for six voices is a composition by Lisa Holmqvist ; photographs are by Jeff Weber ; edited by Philip Baber and Snejanka Mihaylova ; part of the text was translated from Italian by Lindy Baker