TY  - BOOK
AU  - Reena Kumari
TI  - Environmental Challenges of the 21st century
SN  - 978-93-84402-95-2
U1  - 363.70068 
PY  - 2018///
CY  - New Delhi
PB  - Gyan Geeta Prakashan
N1  - includes index
ER  -