Letter from Howard Walter Florey to Jan Wolf, Laborator pro electronovou mikroskopii, Cs akademie ved, Praha Thanks for details of procedure to get a relief preparation of endothelium - until recently was unaware of Wolf's work - will send reprint of paper which is to be published in J Pathology and Bacteriology - asks for reprint of Wolf's paper on observations on endothelium by microrelief technique in Cz Morphol, 1956. 18 December 1957