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 12 February 2026]. DOI 10.2478/2322.