TY  - BOOK
AU  - Nayar, K.R.
TI  - Ecology and health: a systems approach 
SN  - 8176480193
U1  - 367.7 
PY  - 1998///
CY  - New Delhi 
PB  - APH Publishing Corporation
KW  - Ecology
KW  - Human environment
N1  - Includes bibliographical references and index
ER  -