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Technical Paper / Pan American Health Organization.
- Washington, D.C. : Pan American Health Organization, 1986-.
- DC.PAHO.
eng spa.
Communicable disease control--periodicals.
Public health--periodicals.
Chronic disease--periodicals.
Americas.
eng spa.
Communicable disease control--periodicals.
Public health--periodicals.
Chronic disease--periodicals.
Americas.