1. Adapted for indexing hospital records by diseases and operations;International Classification of Diseases,1962
2. Regional differences in hospital use standardized by reported morbidity;Blumberg;Med. Care,1982
3. Variations in hospital length of stay: their relationships to health outcomes;Chassin,1983
4. Hospital adaptation of ICDA, H-ICDA;Commission on Professional and Hospital Activities,1968
5. Length of stay by diagnosis and operation;Commission on Professional and Hospital Activities,1991