MRUGAŁA, Szczepan and SIWEK, Krzysztof. CHANGES IN FREQUENCY OF OCCURRENCE OF YEARLY PRECIPITATION ANOMALIES IN THE LUBLIN REGION IN THE SECOND HALF OF THE 20TH CENTURY. Bulletin of Geography. Physical Geography Series. Online. 1 December 2009. No. 2, pp. 63-68. [Accessed 5 February 2025]. DOI 10.2478/2322.