TY - BOOK AU - Halperin,William AU - Baker,Edward L. AU - Monson,Richard R. TI - Public health surveillance SN - 0442007620 PY - 1992/// CY - New York PB - Van Nostrand Reinhold KW - Population surveillance KW - methods KW - essays KW - Public health N1 - Compilation of essays ... derive from lectures that were presented in a course at the Harvard School of Public Health in the fall of 1989 ER -