Who defined "case study as a comprehensive study of a social unit be that unit a person, a group, a social institution, a district or a community"?

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Pauline V. Young is credited with defining a case study as a comprehensive study of a social unit, be that unit a person, a group, a social institution, a district, or a community. This definition highlights the in-depth and holistic approach of case study research in understanding complex social phenomena.

Who Defined "Case Study as a Comprehensive Study of a Social