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American journal of public health (1971) / American Public Health Association.-- (1971) -.-- Washington ISSN 0090-0036   Full Text Free - Controlled access by IP URL http://ajph.aphapublications.org/loi/ajph Available since    1911 Also on the years    1541-0048 Full Text Free - Free access URL http://www.medscape.com/viewpublication/1014 Available since    2003 Also on the years    1541-0048 Full Text Free - Free access URL http://www.ncbi.nlm.nih.gov/pmc/journals/259/ Available since    1971 Also on the years    1541-0048