TY  - BOOK
AU  - Verma, P.S.
AU  - V K Agarwal
TI  - Environmental Biology: principles of ecology 
PY  - 2021///
CY  - New Delhi
PB  - S.Chand
KW  - Ecology
KW  - Biology
N1  - includes Glosary,bibliographical references and index
ER  -