Position Paper: Toward Standard Classification Schemes for Nursing Language: Recommendations of the American Nurses Association Steering Committee on Databases to Support Clinical Nursing Practice. - Kathleen A. McCormick; Norma M. Lang; Rita D. Zielstorff; D. Kathy Milholland; Virginia K. Saba; Ada Jacox (J. Am. Medical Informatics Assoc., 1994)