RT Journal Article SR Electronic T1 Essays on the History of the Microscope JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 691 OP 692 DO 10.1136/jcp.34.6.691-e VO 34 IS 6 A1 Drury, RAB YR 1981 UL http://jcp.bmj.com/content/34/6/691.5.abstract AB