HELGASON T. [red.] 542,420 METHODOLOGY Methodology in evaluation of psychiatric treatment : Proceedings of a Workshop held in Vienna 10—13 June 1981 / ed. by T. Helgason ; in collaboration with E. E. Anttinen [et al.] ; European Medical Research Councils C-l- — Cambridge [...] : Univ. Press, [1983]. - XVII, [1], 273 s. : wykr. ; 24 cm ISBN 0521-25592-9