1.: Proceedings of the first world congress of veterinary dermatology, Dijon, France, 27-30 September 1989 / edited by Claudia von Tscharner, R. E. W. Halliwell 2.: Proceedings of the 2. world congress, Montreal, Canada May 13.-16. 1992 / edited by Peter J. Ihrke, Ian S. Mason, Stephen D. White |