TY  - BOOK
AU  - Helperin, William (ed); Baker, Edward L. (ed) & Monson, Richard R. (Consulting Ed)
TI  - Public health surveillance
SN  - 0-442-00762-0
U1  - 614 Hel/Bak 
PY  - 1992///
CY  - Van Nostrand Reinhold, New York
ER  -