Srtka, P., J. Liska, and P. Kapitola. 1998. Sort report on occurrence of harmful factors in Czechia in 1997. Pages 157-160 In W. Grodzki, M. Knizek, and D. Forster (eds.), Methodology of forest insect and disease survey in Central Europe. Proceedings of the First Workshop of the IUFRO Working Party 7.03.10, April 21-24, 1998, Ustron-Jaszowiec, Poland. Instytut Badawczy Lesnictwa (Forest Research Institute), Warsaw, Poland.