RT Journal Article SR Electronic T1 COLLECTION OF THE ÆCIAL STAGE OF CALYPTOSPORA COLUMNARIS (ALB. & SCHW.) KÜHN JF Science JO Science FD American Association for the Advancement of Science SP 814 OP 815 DO 10.1126/science.30.779.814 VO 30 IS 779 A1 Fraser, W. P. YR 1909 UL http://science.sciencemag.org/content/30/779/814.abstract AB