TY  - BOOK
AU  - Purohit, S. S.
TI  - A text book of environmental sciences : as per unified ugc syllabus
SN  - 81-88826-14-6
U1  - 574.5 
PY  - 2004///
CY  - Jodhpur
PB  - Student Edition
KW  - Environmental sciences
ER  -