@inbook{66b0e2c57b714d2dae4476d1a1ad42a4,
title = "Procedure of Ra-228 determination in environmental samples by the measurement of Ac-228 beta activity (the method developed at Ris{\o} National Laboratory)",
keywords = "10-S milj{\o}",
author = "P. Roos and I. Kaminska and E. Chrzanowski",
year = "2003",
language = "English",
pages = "123--136",
booktitle = "[Papers and presentations]",
publisher = "Ris{\o} National Laboratory",
note = "Seminar on sampling techniques, radiochemical methods, detectors and measurements : Baltic-Danish Co-operation on Radiation Protection ; Conference date: 04-11-2002 Through 08-11-2002",
}