000
00265nam a2200109 a 4500
003
EIA
001
10087
942
_0
2
_2
ddc
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BK
245
_a
Excavation systems :
_b
planning, design, and safety
008
141112s1981 ck r 000 u spa d
082
_a
624.152
_b
T944
999
_c
5674
_d
5674