TY  - BOOK
AU  - Lee, Hi-Keun ,
AU  - Yang, Hyung-Sik,
AU  - Chung, So-Keul,
TI  - Environmental and safety concerns un underground construction vol.I
SN  - 9054109114
U1  - 624.190289 
PY  - 1997///
CY  - Rotterdam
PB  - Aa Balkema
KW  - Civil engineering
ER  -