Media type: E-Article Title: The Effect of Item Observability, Clarity and Wording on Patient/Nurse Ratings when using the ASA Scale Contributor: Halfens, Ruud J. G.; Alphen, Arnold van; Hasman, Arie; Philipsen, Hans Published: Wiley, 1999 Published in: Scandinavian Journal of Caring Sciences, 13 (1999) 3, Seite 159-164 Language: Not determined DOI: 10.1080/02839319950162516 ISSN: 0283-9318; 0000-0000 Keywords: Public Health, Environmental and Occupational Health Origination: Footnote: