The concept of primary health centre was first given by :

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E6 Comprehensive Textbook of Community Health NursingShyamala D part 1 (pp 26-389 of 389) pp. 69-71, 70-72
Practise the full RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023
Attempt every question from this paper in a timed mock, then review the full solution for each one.