a report on the 2nd international beta genetic resources workshop held at the institute for crop science and plant breeding,braunschweig, Germany ,24-28 june 1991 Rome IBPGR 1992 1992 lxxix,74p. 30cm PRODUCTION OF PROPAGATIONAL ORGANISMS AND NEW VARIETIES CULTIVATION AND HARVESTING AGRICULTURAL AND SPECIFIC TECHNIQUES SPECIAL TECHNIQUES DEVELOPMENT OF NEW VARIETIES 631.523 INT 9290432144