O wystapieniu ognisk gradacyjnych sowki pszenicowki (Parastichtis basilinea Schiff.) w rejonie Pomorza Zachodniego | On the occurrence of gradation centres of Parastichtis basilinea Schiff. in the western pomerania area. [Cereal crops, insect pests] | On the occurrence of gradation centres of Parastichtis basilinea Schiff. in the western pomerania area
1972
Dubniak, H.