TY  - BOOK
AU  - Friis Robert H
TI  - Essentials of environmental health
T2  - Essential Public Health Series
SN  - 13:9780763747626
U1  - U:(G:55):(L:5), P7 
PY  - 2007///
CY  - Sudbury
PB  - Jones and Bartlett        
KW  - Geography
N1  - Bibliography chapterwise; Glossary P 355-365
ER  -