Position sensitive gas counters for x-ray detection - Macchione, Eduardo Luiz Augusto; Koide, Kiyomi; Leite, M A L; Sini, Sandro Mendes; Dietzsch, Olácio; Bairrio Nuevo Junior, Antonio (Synchrotron Light: Applications and Related Instrumentation; Proceedings of the I Workshop, Campinas, 1989)