000
00276 a2200109 4500
008
190228b xxu||||| |||| 00| 0
100
_a
Singh, M.
245
_a
Environmental study /
_c
M. Singh
260
_a
New Delhi
_b
Discovery publication
_c
2006
300
_a
344p.
942
_2
ddc
_c
BK
999
_c
9429
_d
9429