00312nam a2200109Ia 4500008004100000082003300041100002200074245003500096260004900131300001000180650001200190140113s9999    xx            000 0 und d  a581.824.2:632.522:576.858 K6  a"Esau, Katherine"  a"Plants, viruses, and insects"  b"Cambridge : Harvard university press, 1961"  a110p.  aViruses