000
00256nam a2200109Ia 4500
082
_a
621.193
_b
SAX
100
_a
Saxena,Subash C
245
_a
Tunnel engineering
260
_b
Dhanpat Rai Publication
_a
New Delhi
_c
2012
300
_a
176p.
942
_2
ddc
_c
BK
_0
10
999
_c
5811
_d
5811