5 results on '"N. M. Petrov"'
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2. [Certain problems of organizational-methodological work of the Republic's Center of Health Education]
3. [Certain problems of organizational methodical work of the rural regional sanitary-epidemiological station]
4. [Raising the qualifications of sanitary-epidemiologic station workers in rural regions]
5. [Some problems in the organizational and methodological work of a rural district sanitary-epidemiological station]
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