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Links from Books

Items: 2

1.
W H Bruvold
Am J Public Health. 1993 Jun; 83(6): 872–880.
PMCID:
PMC1694752
2.
D G Altman, J A Flora, S P Fortmann, J W Farquhar
Am J Public Health. 1987 Feb; 77(2): 162–165.
PMCID:
PMC1646823

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