Standardization in immunofluorescence : a symposium : the proceedings of two meetings, the International Workshop of Standardization in Immunofluorescence held in Florence in Oct. 1967 and a round table conference held in London in Oct. 1968, under the auspices of the Permanent Section for Microbiological Standardization, International Association of Microbiological Societies - Holborow, E. J. 1918-2009; Brighton, W. D.; Sander, Gernot, 1941-; Taylor, C. E. D. (Blackwell Scientific Publications, 1970)