American Journal of Preventive Medicine
American Journal of Preventive Medicine > 1998 > 14 > 3 Supplement 1 > 67-71
American Journal of Preventive Medicine > 1998 > 14 > 3 Supplement 1 > 53-59
American Journal of Preventive Medicine > 1998 > 14 > 3 Supplement 1 > 87-92
American Journal of Preventive Medicine > 1998 > 14 > 3 Supplement 1 > 72-77