00297nam a2200109Ia 4500008004100000082002400041100002600065245002500091260004800116300001000164650001300174140113s9999    xx            000 0 und d  a632.38:576.8.097 J7  a" Matthews, R. E. F."  aPlant virus serology  b"London : Cambridge university press, 1957"  a128p.  aserology