TY  - BOOK
AU  - O.D Tyagi
TI  - A textbook of envirnmental chemistry
SN  - 8170413524
AV  - QD31.2 .T9 1992 12501
PY  - 1992///
CY  - New Delhi
PB  - Anmol
KW  - envirnmental chemistry
KW  - environmental chemistry
ER  -