Orkwiszewska A, Gładykowska-Rzeczycka J. The Frequency of Birth and Morphology of Premature Newborn in the Gdansk District. AR [Internet]. 1994 Dec. 30 [cited 2025 Dec. 26];57(1-2):33-7. Available from: https://www.czasopisma.uni.lodz.pl/ar/article/view/12795