author = { Polish Seminar on Positron Annihilation 20 1988 Piechowice Świątkowski, Wacław AND Chojcan, Jan },

title = { Proceedings of the 20th Polish Seminar on Positron Annihilation, Piechowice, May 16-21, 1988 },

publisher = {Wydawnictwo uniwersytetu wrocławskiego},

keywords = { Konferenzschrift },

year = {1988},

booktitle = {Matematyka, fizyka, astronomia ; 56},

booktitle = {Acta Universitatis Wratislaviensis ; no 1204},

address = { Wrocław },

url = { http://slubdd.de/katalog?TN_libero_mab2 }