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6by Mayer, Joni A, Slymen, Donald J, Clapp, Elizabeth J, Pichon, Latrice C, Eckhardt, Laura, Eichenfield, Lawrence F, Elder, John P, Sallis, James F, Weinstock, Martin A, Achter, April, Balderrama, Cynthia, Galindo, Gabriel R, Oh, Sam SGet full text
Published in American journal of public health (1971)
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