00409nam a2200133Ia 4500008004100000082003200041100002500073245006100098260004200159300000900201600002300210600002300233650001900256140113s9999    xx            000 0 und d  a578.085.23:576.311:612.3 M3  a" Helgeson,John P. "  aUse of tissue culture and protoplasts in plant pathology  b"New York : Academic Press Inc, 1983"  a194p  a" Deverall, B. J."  a" Deverall, B. J."  aTissue culture