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Sov Zdravookhr. 1960;19(2):82-7.
[Article in Russian]
ZAKHAROV AV.
PMID: 13846850 [PubMed - indexed for MEDLINE]
Sov Zdravookhr. 1983; (8):47-51.
[Sov Zdravookhr. 1983]
ZFA (Stuttgart). 1983 Sep 10; 59(25):1351-4.
[ZFA (Stuttgart). 1983]
Salud Publica Mex. 1973 Nov-Dec; 15(6):823-9.
[Salud Publica Mex. 1973]
Rev Sci Tech. 2004 Apr; 23(1):297-304; discussion 391-401.
[Rev Sci Tech. 2004]
J Epidemiol Community Health. 2004 Sep; 58(9):794-800.
[J Epidemiol Community Health. 2004]
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