References
Erde, EL. Some model documents for a DNR pollcy. HEC Forum 1: 247–60; 1989.
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Liss, H.P. Letter to the editor. HEC Forum 2, 345–346 (1990). https://doi.org/10.1007/BF00057834
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DOI: https://doi.org/10.1007/BF00057834