00339nam a2200109Ia 4500008004100000082001800041100002800059245005600087260003800143300001500181650003300196140113s9999    xx            000 0 und d  a016:632.38 L6  a" Beale, Helen, Purdy;"  aBibliography of Plant Viruses and index to Research  b"USA : Library of Congress, 1976"  aXII; 1495p  aAgriculture - Plant Diseases