[en] The 13th Meeting of Member States of RCA (Regional Co-operative Agreement for Research, Development and Training Related to Nuclear Science and Technology) was held on 26 September 1984 in Vienna. This document constitutes the report of that meeting. It includes the list of participants, agenda, summary of discussions, and 1984 costing table. The Report of Recommendations for the meeting consisted of the Summary Report of the Sixth RCA Working Group Meeting held in Kalpakkam, India, 20-23 March 1984. This Summary Report dealt with such topics as RCA research projects (including nuclear techniques to improve legume and buffalo production, radiosterilization of medical supplies, maintenance of nuclear instruments, isotope applications in hydrology and sedimentology), progress of the RCA/UNDP Industrial Project, and future programmes and budget