00668nam a2200241 4500 DLU020017736 ##4/23/2001 978- eng 631.523 VI-D Virchow, Detlef Conservation of genetic resources : cost and implications for a sustainable utilization of plant genetic resources for food and agriculture / Detlef Virchow Berlin : Springer-Verlag, 1999 243 tr., XX; 24 cm. 1312504 DLU False Administrator G A SH Thư viện Trường Đại học Đà Lạt