1. The increasing concern with infertility: Why now?;Aral;Journal of American Medical Association,1983
2. Symbolic interactionism: Perspective and method;Blumer,1969
3. Patient drug self-administration improves regimen compliance;D'Altroy;Hospitals,1978
4. Hazards in hospital care: Ensuring patient safety;Fagerhaugh,1987
5. The discovery of grounded theory;Glaser,1967